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VAC Master preamplifier and Signature 200 iQ power amplifier

The Valve Amplification Company was founded in 1990 by Kevin Hayes and his father Channing Hayes. The company made its name producing the Marantz Classic series of amplifiers for Marantz Japan from 1996 to 1998 (Marantz Model 7 / 7C, Model 8B, Model 9). Based in Sarasota, Florida, VAC has carved a niche reputation as one of the world’s most innovative designers and producers of valve amplifiers. Hayes is one of those rare manufacturers who personally listens to and voices each product that leaves the factory and has a complete command of the workings and sounds of his products. In these days of being told by companies, “your call is important to us” Kevin Hayes means it!

Signature 200 iQ Power amplifiers

The Signature 200 iQ is available as a single stereo amplifier, rated at around 100w per channel, or it can be reconfigured by a toggle switch to a monoblock. Switches also reconfigure the circuits between fully balanced input-to-output or RCA single-ended input.

Developed over 17 years of research with many innovations over its predecessor, the VAC PHI200 features the VAC iQ Continuous Automatic Bias System, which holds the vacuum tube at the correct bias current. This will even shut down the amplifier before the fuse blows, such is its reaction speed. If I think about the time I’ve spent driving around the M25 to repair a valve amplifier that has been “taken out” by a faulty tube, that fast shutdown is useful!

Cathode self-bias output stages drift toward Class B (or beyond) with volume level, while “fixed bias” amplifiers shift toward greater idle current with increased volume. These changes in idle current shift the relationship between the anode characteristics of the tubes and the load line presented by the speakers/output transformer. This is a bit of ‘shifting sand’ foundation, but the iQ system results in a much firmer foundation.

VAC Signature 200 iQ power amplifier

Interestingly, many solid-state amplifiers are designed to do the exact opposite of this, deliberately shifting the bias point with volume level. They fail to be in Class A for unexpected transients and are not in the output device’s most linear operating region at low volume levels.

The 200 iQ’s use highly linear low-mu triodes in the input and driver stages, and the stages are direct-coupled, resulting in extended low frequencies and fast transient response. In balanced mode, these stages are fully balanced. A shield for heat and electrostatic forces is provided between the output tubes and the input/driver section, for greater tube life and improved sound. The 200 iQ amps come with KT88’s fitted, but the unit will work with KT90, KT99, KT120, KT150, and KT170. However, Hayes finds that using KT88’s yield lower distortion and better high-frequency bandwidth.

The ultra-linear output configuration uses proprietary 6.35kg, 21-section, bifilar wound output transformers. There are coupling connections for two, four, and eight-ohms loudspeakers.

VAC Master Preamplifier

The Master Preamp looks almost identical to the Signature Mk2a; it is a two-box affair, power supply and preamp box, illuminated with the blue VAC logo, which a toggle switch in the back can switch off. There are minor cosmetic differences such as the thicker fascia and machined feet. However, internally, the audio circuits are carried on mass loading plates decoupled from the chassis, significantly reducing the effect of vibration on the sound. The volume control is a massive, brass-cased affair made by ALPS, which VAC motorises for remote capability. The control weighs a few kilogrammes and accounts for about 20% of the line stage’s cost. Similarly, the Master includes 50 very expensive, exotic Z-foil resistors made by a firm in Texas.

On the front panel are two large, expensive-looking knobs, input and volume. There are four smaller knobs, which control power, mute, logo and cinema bypass. On the rear, there are high-quality single-ended as well as balanced inputs; five in total plus an optional phono-stage. The phono stage costs an additional £12,000. There is a good selection of impedances, and the MM and MC each have their pairs of RCAs, so it is possible to have both an MM and MC cartridge connected simultaneously and flick between them without pulling out any wires. The preamp has two pairs of XLR and RCA outputs, making bi-wiring relatively straightforward.

VAC Master preamplifier

The preamp uses a pair of 6922 triode tubes for the zero-feedback line stage, which is more like a small Class A1 power Amplifier than a conventional preamp. Each fully-balanced channel has zero negative feedback and is coupled to the outside world via a 1:1 ratio input transformer and a step-down output transformer. The result is reasonable gain, low output impedance, with massive current capability. Transformer coupling and zero feedback prevent interactions between feedback loops in the power amplifier and the source components, allowing the sources to perform best.

Passive equalisation

The phono stage uses six 12AX7s and passive equalisation. Looking into the unit with the lid off, it is evident from the point-to-point wiring, those naked Z-foil resistors, rhodium jacks, oversize high-quality parts, and high contact force mechanical switches that much thought has gone into the topography of the wiring. The audio circuits are carried on isolated mass loading plates to resist external vibrations and increase the purity of the sound.

VAC Master preamplifier

The layout and hand wiring are visually beautiful to behold, I wouldn’t be surprised to see this on exhibition at the Tate Modern! The units are lovingly finished in a thick black lacquer and come in a metallic finish. There is only a bespoke remote-control unit with mute and volume, no input control. Hayes has taken the long way around here, there are far cheaper ways to do volume control than using a motorised belt-driven ALPS HQ PRO, but none that sounds as good. One minor gripe with this was that the angle I could use the remote was limited, and how my system is set out involves a stretch!

Listening

Using some Bowers & Wilkins 802 D4s, a dCS Network Bridge with a Chord DAVE and M-Scaler, a PS20 power regenerator, Townshend Audio interconnects, and speaker cables, I gave the two monoblocs a few hundred hours of break-in time, observing how the sound was changing in the process.

First, Mahler’s 6th Symphony, Kirill Petrenko with the Berlin Philharmonic 96/24. From the pounding marching of the opening, the VAC combo can do guts, scale and incredible accuracy. Bass is thunderous, fast, powerful and very unlike the stereotype of valve amplification. There is an airiness to the soundstage, which gives the impression of this massive Mahler orchestra extending way back and precisely layering the different rows of instruments of the Berlin Philharmonic. There is a sweetness to the tone of the violins and the woodwinds, absolutely no harshness, just a mellowness you hear from great instruments in the flesh. Real depth to the string sound, palpable and weighty, without any smear or smudging. A remarkable combination of massively gripping sound, which is not at all fatiguing to listen to. It also does what marks a good system out from a great system: play a sixty-piece orchestra recorded relatively naturally in a Mahlerian climax. This is where less-than-stellar systems so frequently fail. When the climax occurs here, the VAC combo has immense control; nothing is sacrificed, no loss of detail, fast immediate transients, and no distortion, just a highly coherent reproduction of a huge orchestral climax!

One of the most pleasurable experiences of playing in an orchestra as a violinist is to watch a great work being stripped down to its component parts. For example, a Mozart Symphony is rehearsed in smaller groups of instruments. I remember this experience listening to the late Claudio Abbado conducting the Mahler Chamber Orchestra in Mozart’s Haffner Symphony. With the VAC combo, I can sit in the middle of the orchestra and follow the lines and textures of the individual instruments, I can hear the most minute detail illuminated in the score, how the sheer brilliance of Mozart’s orchestration becomes apparent. It is revelatory and exhilarating to experience. It is presenting vast quantities of detail, and texture and makes the experience of listening like performing.

Best of Breed

On to a spot of vinyl, Art Farmer’s “On the Road” and “Downwind”, it is clear that the phono stage is doing what the best of breed do, bustling in detail, etching the 3D space like CD can struggle with, the hi-hat sounding completely organic and non-brittle, a ‘phatness’ and generosity to the sound which sounds so like the master tape recordings I’ve heard. This £12,000 addition to the preamp is no afterthought and can compete with the best stand-alone affairs available.
The VAC offering here is reassuringly expensive: it is the investment you’d make if you take your music listening very seriously. It is state-of-the-art in terms of amplification and phono-wise, it is the fruit of infinite care and sheer obsession with excellent sound, and it is to be thoroughly recommended for those seeking the highest performance levels available today.

Technical specifications

Master Preamplifier

  • Type Line (with optional phono) tube preamplifier
  • Inputs 3 sets RCA line input, 2 sets balanced/RCA selectable inputs, 1 set balanced/RCA cinema bypass input, Optional 1 MM and 1 MC (or additional line input if phono is not fitted)
  • Outputs 2 sets RCA, 2 sets balanced XLR (EIA “pin 2 hot” studio standard)
  • Gain 11dB
  • THD < 0.009% @ 1 kHz, 1 V RMS
  • Maximum Output < 8 V RMS
  • Output Impedance < 150 ohms, 20 Hz–20 kHz, static (i.e., not dependent upon feedback)
  • Recommended Output Load > 300 ohms
  • Dimensions (H×W×D) Audio chassis (not including knobs and connectors) 14 × 45.7 × 36.8 cm
  • Power supply (not including connectors) 10.9 × 45.7 × 36.8 cm
  • Weight 27.7kg
  • Price £30,000, phono option £12,000

Signature 200 iQ power amplifier

  • Type Mono valve power amplifier (can be used as a stereo amp)
  • Power Output 200 watt mono (100w stereo)
  • Tube Complement 4 × type 6SN7, 4 × type KT88. Compatible with KT120. Electrically compatible with KT150 (may be too tall to fit under the cage)
  • Frequency Response 4 Hz to 85 kHz, +0/-3 dB
  • Dimensions (H×W×D) 457 mm × 438 mm × 222 mm
  • Weight 45.5kg
  • Price £30,000

Manufacturer

VAC

www.vac-amps.com

UK distributor

Signature Systems

www.signaturesystems.co.uk

+44(0)7738 007776

Back to Reviews

Focal Utopia 2022 headphones

In 2016, Focal joined the headphone tsunami by introducing its Utopia and Elear models. I reviewed the original Utopia headphone for The Absolute Sound that same year, I concluded my review, “If you want to hear and feel just how good headphone listening can be, I invite you to give the Focal Utopia headphones serious consideration. They are a true reference component worthy of the finest system.”

Since then, Focal has expanded its over-ear headphone line to nine different models ranging from the Listen Professional to the newly revised Utopia. And while it would be easiest to refer to this new model as the Utopia II, on Focal’s website Focal refers to it as Utopia 2022, so that’s what we’ll call the latest iteration of Focal’s Utopia during this review.

Tech Tour

How has Focal improved what was already a superb headphone? Let us count the ways…the first and foremost change is the price. The Utopia 2022 are considerably more expensive than the original version. Much has changed to justify the price increase besides inflation and maintaining profit margins. The new voice coil is the most notable difference between the original Utopia and the 2022 version. Focal engineers developed a voice coil that uses copper and aluminium in an alloy that Focal claims “provides a rejuvenated sound signature that lends even greater neutrality, with powerful bass and more mellow treble.”

Focal Utopia 2022

The Utopia 2022 still uses the same M-shaped Beryllium driver, but now the grills inside the earcups are also M-shaped. Like the original, the Focal Utopia 2022 has a frequency range from 5Hz to 50KHz, and the patented drivers have no active or passive equalisation or voicing to affect their native harmonic character.

The Utopia 2022’s yoke employs a new material – forged, recycled carbon. It has a unique texture and surface that departs from Utopia’s slicker finishes, such as the honeycomb grills and glossy black accents. Other premium details include the genuine leather headband and leather-covered perforated memory foam earpads.

Ergonomics

The predominant colour on the Focal Utopia 2022 is black. The enclosures are glossy black, the headband black leather, and the yoke mottled matt black. The only trace of colour is the red circle behind the flame at the rear of the enclosure. This differs from the first-generation Utopia, which had a chrome centre that contrasted with the rest of the unit. I think the 2022 version looks more stylish than the original colour scheme, but I’ve always liked the colour red.

Although the Utopia 2022 is not an especially light headphone, it is remarkably comfortable. The weight does not become fatiguing even after several hours of listening. I have a 7 1/8 sized head, which has proven a bit too small for some headphones without the addition of a baseball cap, but the Utopia 2022 doesn’t require the additional headgear to fit me perfectly. Those with larger heads will find the Utopia 2022 equally comfortable since the side pressure doesn’t change as the headband widens.

Headphones, by their very nature, take more physical abuse than any other audio component except perhaps portable players. The Utopia’s design and materials make it as indestructible as any headphone I’ve seen. There are no plastic parts to break or warp with age. During the review period, my fifteen-year-old cat managed to fall off my computer desk, taking the Utopia with her as she fell. Except for a few minor claw marks on the headband, neither the cat nor the Utopia were worse for wear after their frolic.

Focal Utopia 2022

The only ergonomic failure in the Focal Utopia 2022 is the single-ended cable. While other headphone and cable manufacturers have come up with many excellent cable options which are pliable, lightweight, and ergonomically elegant, the cable supplied with the Utopia 2022 had none of these characteristics. It was stiff, which is odd since it was not especially large in diameter, yet it stubbornly retained the deformations incurred during packaging and shipment.

Given its price and premium positioning, I wasn’t surprised that the Utopia 2022 has a second cable configured for a balanced XLR connection. Although the Utopia 2022 is quite efficient, I’m sure that many prospective owners will want to use a balanced XLR connection because their headphone amplifiers have that option. Since the Utopia 2022 has Lemo connectors changing the cable was easy. I also liked that the balanced XLR cable is 3 meters (ten feet) long and far more pliable than the single-ended one.

Along with the standard big ol’ presentation box for your attic, the Utopia 2022 comes with an excellent form-fitting hard case for travel. It has just enough room for the Utopia 2022 and its two cables. But will anyone travel with the Utopia 2022? Given that the Utopia 2022 utilises an open capsule design so that whatever you’re hearing will also be heard by those in your near vicinity, it’s certainly less than ideal for aeroplanes, waiting rooms, or libraries than a closed capsule or in-ear monitor, which would deliver far more isolation. But it is a lovely travel case.

Sound

Some reference-level headphone reviews claim that their subjects can only achieve their full potential when driven by an equally expensive headphone amplifier. I did not find that true with the Focal Utopia 2022. I used a wide variety of headphone amplifiers with the Utopia 2022, including the Topping A90 Discrete, FiiO K9 PRO ESS, Sabaj A20H, Schiit Magnius, Brz Transformer headphone amplifier, Gold Note DS-10+, Inspire Dragon IHA-1, and Boulder 812. In every case, the Utopia 2022 sounded superb. My favourite combination was the Boulder 812/Utopia 2022 combination. This set-up had the most apparent dynamic drive and feeling of harmonic solidity, but even with the least expensive headphone amplifier, the Sabaj A20H, the Utopia 2022 had a level of detail, harmonic cohesion, intimacy, and involvement that was difficult to tear myself away from.

I spend much of my headphone-listening time with my Stax SR-407 electrostatic headphones driven by a Stax 007t or one-of-a-kind hand-wired custom-built tube headphone amplifier. Comparing the Utopia 2022 with my Stax rigs, the Utopia had greater dynamic range and more bass, especially low bass, energy. The Stax systems do a superb job of delineating the entire soundstage and upper frequency’s air. At the same time, the Utopia 2022 excelled at capturing the soundstage in a more controlled manner with less air but greater solidity to the image. At times the Stax can sound diaphanous. In comparison, the Utopia 2022 delivers the entire frequency range with superior solidity and harmonic equanimity.

Focal Utopia 2022

The Utopia 2022 have an exemplary low bass response. The bass below 60 Hz is clean, tuneful, powerful, and rhythmically dynamic on well-recorded music. The Utopia 2022 can output too much of a good thing on some pop recordings where the bass has been boosted. The Utopia 2022 bass never got distorted or out of control, even on bass-heavy tracks like DJ Snake’s “Too Damned Low”, but it could get oppressive and fatiguing to the point where if a bass level control were available, I would have reduced the bass level somewhat.

One sonic parameter where the Focal Utopia 2022 excelled was its precision in delineating the soundstage. All instruments had a particularly convincing solidity and spatial presence, which while not unique, was pervasively obvious. The edges of each instrument’s space were delineated cleanly, with specific dimensionality. Several years back, I had the pleasure of recording a workshop at the Rockygrass Academy by Chris Thile, Chris Eldridge, and Gabe Witcher. It was recorded on a single stereo mic onto a 96/24 recorder. I often this use for reference, especially for headphones since when I made the recording, I was monitoring through headphones. Through the Focal Utopia 2022, I was transported back to the moments when the recording was made – all the spatial cues and three-dimensionality of the recording were effortlessly reproduced by the Utopia 2022. It was as if I were in a time machine.

Competition

When a headphone is priced in the ultra-premium category, it has a plethora of competition. And while the technologies, materials employed, and ergonomics vary from headphone to headphone, the one thing common to all headphones is the question, “How well do they fit?”

I have some wonderful-sounding headphones that I rarely use, except for sonic comparisons, because they fit me so poorly. The second-generation Abyss Diana is a case in point. I added additional padding to the underside of the headband, but it is still an awkward fit for me. These same headphones could be an excellent fit for you, however.

Focal Utopia 2022

Fit is so individual that choosing the right headphone is even more personal and important than your sonic preferences. For my head and ears, the Utopia 2022 was perfect. It even stayed on my head when I shook it for five seconds vigorously. Very few comfortable headphones stay on for that test. The ones that do remain on my head are usually the ones that I can’t wear for long due to their excessive side pressure. But the Utopia 2022 has that rare combination of comfort and a secure fit.

The two other reference headphones that fit me almost as well as the Utopia 2022 are the Dan Clark Stealth and the Stax SR-407. I have to use a baseball cap with the Stealth for a perfect fit, but they are so light, and the side pressure is just enough so that’s easy to forget I’m wearing them. The Stax SR-407 are also lightweight, and the ear openings are just large enough so my ears fit comfortably inside. But if your ears are a bit larger, good luck.

Summary

I’d like to leave you with this – to find your ideal headphone, you will have to try them on and see if they are “the one” in terms of fit. In terms of sound, I seriously doubt you will find the Utopia 2022 wanting. But for me, and I suspect for you as well, the fit will be the primary determining factor in how much you will use and enjoy a reference pair of headphones after you purchase them. If you find the Focal Utopia 2022 as comfortable as I do, it may qualify as your lifetime reference-quality headphone. The Utopia 2022 is simply an outstanding component from a company with a long history of creating high-value, high-performance transducers. And, to quote my previous Utopia review, “They are a true reference component worthy of the finest system.”

Technical specifications

  • Type Circumaural, open-back headphones
  • Impedance 80 Ohms
  • Sensitivity 104dB SPL / 1mW @ 1kHz
  • THD < 0.2 % @ 1kHz / 100dB SPL
  • Frequency response 5Hz–50kHz
  • Speaker driver 1 40mm pure beryllium ‘M’-shaped dome
  • Cable provided 1 × 5ft cable (1.5m) with 1 × 1/8” (3.5mm) asymmetric TRS Jack connector and 2 × Lemo connectors
    Cable provided 1 × 10ft cable (3m) with 1 × symmetrical 4-point XLR connector and 2 Lemo connectors
    Adaptor provided 1 × Jack adapter, 1/8” (3.5mm) point socket – 1/4” (6.35mm) point plug
  • Dimensions (in supplied carry case) 25 × 24 × 12cm
  • Weight 490g
  • Price £4,699/$4,999

Manufacturer

Focal

www.focal.com  

+33(0)4 77 43 57 00

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Music Interview: Don Reedman

When producers Don Reedman and Jeff Jarratt came up with the Classic Rock concept in 1978, they pioneered the idea of the orchestral rock and pop crossover – the project took songs by the likes of David Bowie, The Moody Blues, Led Zeppelin and The Rolling Stones and, with the help of the London Symphony Orchestra (LSO), turned them into symphonic rock epics.

The original Classic Rock album became a multi-million seller – it went platinum – and now, 45 years later, it’s been reissued and remastered as Classic Rock Renaissance, but with some new songs, including versions of Coldplay’s ‘Viva La Vida’, ‘Hello’ by Adele, Snow Patrol’s ‘Run’, ‘Human’ by Rag ‘n’ Bone Man and Muse’s ‘Uprising.’

hi-fi+ spoke to Don Reedman to discover how he invented the Classic Rock concept and recorded the new tracks.

SH: Let’s talk about Classic Rock Renaissance, which features new songs from the likes of Coldplay, Adele, Snow Patrol, Rag ‘n’ Bone Man and Muse, as well as remastered versions of songs from the original album by David Bowie, Pink Floyd, The Beach Boys, Led Zeppelin, and more. How did you choose the new songs to fit alongside the original recordings?

DR: We actually started working on it five years ago, but they are all contemporary. They were songs that I felt worked symphonically for various reasons – the Muse song because of its energy and the big chorus, and ‘Hello’ by Adele has an amazing big chorus. It lends itself to a big, symphonic arrangement. That’s really the criteria of all the songs we choose – start with a great song and then go from there, use our imagination and the arranger’s, and see what we can come up with.

Do you think there are fewer classic songs around nowadays?

When we started the original Classic Rock, we had a couple of decades of great music – we ended up doing about nine albums. We used them all up, so it’s now harder to come by because we don’t have that depth to call on, but the material’s out there – one’s just got to keep one’s eyes, ears and imagination open.

You recorded the new songs at Abbey Road, didn’t you?

Yes – we’ve always recorded at Abbey Road. The main reason is that we want a consistency in sound. Abbey Road is not only important sonically, but it’s also the size of the studio – you have to be able to fit in 100 musicians at once.

With Classic Rock, we like to be able to record the whole orchestra in one performance. We always use Studio 1. We have remastered recordings on the album which are 30 or 40 years old, but, sonically, they still sound alike to what we did recently.

Abbey Road has an amazing range of valve microphones – the best in the world, but maybe Capitol in L.A. has a similar collection. There is a full-time engineer that just looks after the microphones. It’s all those subtleties that make Abbey Road number one. That’s why it’s so popular for symphonic recordings and movie soundtracks – it’s the most expensive studio in town, but it’s always full.

It’s 45 years since the first Classic Rock album came out, in 1978. How do you feel about that?

It feels like four-and-a-half years. Going back in there was just like we went back yesterday. Of course, the orchestra has changed – there are younger people and it’s not all the same faces, although some of them are.

Don Reedman standing with recording engineer John Kurlander

So, there are people in the orchestra who’ve played on every session?

Yeah – there are.

You first got the idea for Classic Rock in 1975, didn’t you? You saw the London Symphony Orchestra play Tchaikovsky at the Royal Albert Hall, and felt that you could combine the power of an orchestra with contemporary rock music…

That’s right – it was the ‘greatest hits’ of Tchaikovsky. It was the first time I’d seen a full symphony orchestra. I got the idea and then the title – Classic Rock. I thought if you got the rock music of the The Rolling Stones, The Beatles, Pink Floyd and The Moody Blues, and transposed it for 60 to 100 musicians, you could create Classic Rock.

Up until that point, the popular music that had been orchestrated was elevator music – Mantovani and all that. All very nice, but it didn’t rock. I thought I could come up with something different and I could hear it in my head. It was different to anything that had been done, but we needed to choose the repertoire carefully.

So, in 1975, you had rock bands like Queen embracing orchestral music…

Exactly – when we were looking for great songs, ‘Bohemian Rhapsody’ was number one in the charts, so it started from there. We also looked at ‘A Whiter Shade of Pale’, which is very much Bach’s ‘Air on the G String.’ That’s where it started.

I can remember my parents buying the Classic Rock albums when they came out. Were they aimed at rock fans who didn’t buy classical music, or classical fans who didn’t buy rock?

It was probably a bit of both – most people’s music tastes are varied. I think the rock tracks like ‘Whole Lotta Love’, which was a bit of fun really… there are a lot of people who wouldn’t have known that song, but when they hear it symphonically, it appeals to their appetite – they discover it and it’s a new piece of music. But I think it appealed to a lot of people who weren’t into rock music – they heard the songs and they could relate to them.

When you first recorded a Classic Rock version of ‘Bohemian Rhapsody’, you didn’t like it, did you? Why was that? I would have imagined the track would be ideal for a Classic Rock arrangement.

The orchestral arrangement by Andrew Pryce Jackman was great – he was a genius – but he didn’t score the rhythm section. I thought it was classic but it didn’t rock. We scrapped it and I sat down with Andrew and said, ‘This is what I want – it’s got to come in with a powerful rhythm section of bass, drums, guitar etc.’ He rescored it – we scrapped that session, but there was enough in it for me to know that the idea was going to work.

Didn’t it take a while for the music industry to understand the concept of Classic Rock?

Yeah. I started to shop it around to A & M and Polydor – all the major record companies. I’d paid for the recordings myself. They didn’t really get it – they just thought they were cover versions of pop songs. They couldn’t hear it as something saleable.

It was difficult to get anyone to take it on board and finance it, so what happened was that I was working for K-tel – I used to do their compilation albums. They never really invested in new recordings, but I had a deal where I was free to produce albums of original recordings of anyone I wanted to record.

When I played ‘Bohemian Rhapsody’ in the office, we had a new MD called Tony Johnson – he said, ‘What’s this? It’s fantastic.’ I told him the story and he said, ‘We’ve got to have it,’ so I ended up doing a deal with my own company, which was fine. I was pleased – it wasn’t a conflict and they ended up making a lot of money from it. We all did well – it was a win-win.

Artists including David Bowie, Paul McCartney, Pete Townshend and Justin Hayward have all liked the Classic Rock treatment you’ve given their songs, haven’t they?

That’s true. We had a great response from Justin Hayward. I can remember playing ‘Nights In White Satin’ to him – I was quite nervous, because I really wanted him to participate.

The original idea was to have the artist guesting on the record, but that turned out be very difficult, and contractually there were all sorts of problems.

Justin said he loved the version and that next to the original he said it was the best one he’d heard out of the 65 cover versions – I was really thrilled about that. He came in the studio and played guitar on the record – that’s when Paul McCartney came in and had a chat with him. He loved it – he was listening to it on the steps outside the studio. The LSO are one of his favourite orchestras.

Nowadays, we’re so used to seeing and hearing rock artists reimagining their songs for orchestras, but you started all that, didn’t you? When you did the first album, did you see it as a long-term project, or a one-off?

I viewed it in the same way an artist views their career. If you see [old] interviews with Mick Jagger or Paul McCartney and they’re asked how long it will last, they say, ‘Two or three years – we won’t be doing this when we’re 40.’ Mick’s hitting 80 and still doing it…

I viewed Classic Rock as being successful for the moment and then it took on a life of its own. It’s like a child that grows up – you’ve got to look after it and be a good parent.

Classic Rock Renaissance is out now on BMG. It’s available digitally or as a three-CD set.

Back to Music

Thrax Audio Enyo Mk2 integrated amplifier

The Thrax Audio Enyo Mk2 is an integrated amplifier. You can tell as much from the display and the controls, once you have worked out their functions. What you can’t tell without turning it on and looking through the protective grille is that this is a tube amplifier. Those familiar with the sound of pentodes run in push-pull would probably be able to detect a tube characteristic to the sound, but the Enyo sounds a lot less like it produces power with thermionic devices than most of its kin.

The output tubes are concealed within secondary covers within the case with two GU50s per channel. This Russian tube is not very common in audio amplifiers but capable of 50W when operated in this ultra linear fashion. According to Thrax that output is true for both four and eight-ohm loads, which is surprising. This consistency is a result of the unusual DC coupled nature of the circuit. The Enyo has just one capacitor in the DC coupled signal path and combines the GU50s with an ECC88 input tube and a 6N6P driver. It’s collection of devices that are relatively inexpensive to replace when that moment eventually comes. Thrax says that the GU50s are good for 1,000 hours while the smaller tubes last twice as long and are easy to install, thanks to auto-biasing for the output devices.

Thrax Audio Enyo Mk2 integrated amplifier

It has a twin brother in the Thrax Ares. That is a fully transistorised integrated amplifier at the same price as the Enyo. It’s smaller but nearly as heavy because of the carved-from-solid nature of its metalwork. The Enyo is of a more conventional construction with a heavy front panel and large display, but the main case is in steel with plenty of perforation to keep things cool. Both amplifiers appear to share the same preamplifier section, which includes single-ended and balanced inputs, an MM/MC phono stage, and the option to add a streaming DAC board. Both sections have independent power supplies in order to minimise pollution of analogue by digital sections, and possibly vice versa. Unlike 99% of tube amps, the Enyo has a home theatre bypass option, which is essentially a way of bypassing the volume control on one input so that the amplifier can be used to power the front left and right channels in a surround system. Quite how you are going to tonally match this with the amplifier driving the centre channel is another question.

The DAC board is not the usual afterthought found on many integrated amps. It offers the full gamut of inputs including AES/EBU, USB and Ethernet, the latter allowing Enyo to be used as a streamer with control by a third party UPnP app or with Roon. On the numbers front it’s good for up to 32-bit 768kHz PCM (384kHz via ethernet) and DSD256 (4x) which are respectable numbers indicating that this is a modern chipset. That doesn’t necessarily equate to high quality, but is a good start.

Nominal vs real

While output is quoted as being the same regardless of loudspeaker impedance there are four and eight Ohm taps connected to suitably marked terminals on the back panel. As ever with such alternatives it is best to listen to the options rather than picking the one that matches your loudspeaker’s nominal impedance. The word nominal is used because few if any speakers have a consistent impedance at all frequencies, this key characteristic tends to drop at lower frequencies and this is what makes the difference between easy and less easy to drive loudspeakers. It is often more critical than sensitivity when it comes to amp/speaker matching.

Initial listening was via Perlisten S7t floorstanders and this proved to be a particularly favourable pairing. These speakers are very transparent and the Enyo allowed them to deliver imaging that was absolutely superb, really solid and almost holographic in fact. Michael Manring’s ‘Selene’ was also impressive, it feels like you’re getting double the usual data because there’s so much depth, texture and body, and the bass harmonics are particularly attractive. It’s not quite as solid in the bass as the Ares, but the extra body and depth of tone that the tube element brings makes it the more appealing amplifier.

Thrax Audio Enyo Mk2 integrated amplifier

With PMC twenty5.26i speakers and some acoustic music in the form of Gianluigi Trovesi’s Stravaganze consonanti (ECM) performed with original instruments, the Enyo produces a sumptuous get highly detailed result. Acoustic instruments and tubes are a perfect pairing when it comes to amplifiers. They put back what the recording fails to capture, which is essentially harmonic elaboration which while it may not be totally accurate, sounds extremely natural. And in this instance you get more control and definition than is usually the case.

More musical

Using the onboard DAC the results remain excellent, better in fact than many standalone converters. With my Lumin U2 mini connected to the USB input the Enyo gives a really broad, relaxed and inevitably slightly tubey sound that while it’s not as crisp and precise as solid state alternatives makes up for this with an essentially more musical, highly engaging sound. That said, low-level resolution could be a little better, even in a tube design that’s as well thought through as this it’s not possible to push the noise floor down as far as Thrax achieved with Ares.

Phono gain

With the turntable connected to the moving coil inputs and my Rega Aphelion 2 cartridge providing signal I got a hum free result, something that couldn’t be achieved with Ares (perhaps due to the absence of an earth connection on the Rega P10). On a Thiago Nassif track (‘Soar Estranho’ from Mente) the kick drum had the requisite impact and the sound was good and open with decent articulation in the bass. The phono stage doesn’t have a huge amount of gain so you need to whack it up quite a bit to get the dynamics going which is fine until you switch to the digital input and the volume jumps dramatically. The absence of input gain adjustment means that care needs to be taken when making this switch, you have been warned!

Thrax Audio Enyo Mk2 integrated amplifier

Overall the phono stage is good but not in the same league as the DAC. It’s probably equivalent to a separate phono stage at around £1,200, whereas the digital side is as good as something at twice that price maybe more. You’re certainly not very inclined to start scrolling and swiping when Patti Smith is singing ‘Beneath the Southern Cross.’ This proved to be an intense experience that revealed all the power and glory of that remarkable artist. I also like the way that you get a really strong sense of dynamics and energy, without having to turn the level up too high. Well-made modern recordings like Mirage by Lilja sound absolutely delicious with huge scale and really strong presence, there’s even a sumptuousness that you only find on the best analogue recordings. This amp makes it plain that standards in pro audio have taken a substantial leap in the last decade or so.

Listen for longer

An example of vintage analogue sound is Miles Davis’ Live Evil, which doesn’t sound quite so polished by any means, but makes good musical sense with the Enyo’s digital input, especially the guitar and horn on ‘Medley: Gemini – Double Image’, which is superb, powerful and menacing but clean. The beauty of this amplifier is that it can deliver the energy of a piece like this but doesn’t have the graininess of transistor alternatives which can make brass sound brash. It has plenty of power too and will drive a speaker like this PMC with ease, not all tube amps can do this and certainly none of the single ended variety.

When I spoke to the Thrax distributor about the Ares and Enyo, he told me that the tube amp is more popular than its chunky solid state brother. Having heard both I’m not surprised, the Enyo brings out detail and timing exceedingly well and delivers the music in a richer and more fluid fashion. That said I got excellent results with Ares too. It’s unusual to find this sort of alternative within one range and means that it should be possible to audition both in one place, so take your speakers to that place and see which amp works best with them. There will be some pairings that favour Ares for sure, but on balance the Enyo is the more musically beguiling of the two. Any amp that makes you want to listen for longer always is going to be a winner.

Technical specifications

  • Type: Push-pull tube, two-channel integrated amplifier with built-in phono stage
  • Analogue inputs: One MM/MC phono input (via RCA jacks), three single-ended line-level inputs (via RCA jacks), one balanced input (via XLR connectors)
  • Digital inputs Two S/PDIF (one coaxial, one optical), one USB port, one AES/EBU (via XLR), one streaming (via RJ45)
  • Analogue outputs: loudspeaker binding posts
  • Supported sample rates: Coaxial and optical S/PDIF not specified, USB up to 32-bit —768kHz, DSD256
  • Input impedance: High-level 40kOhms, Phono variable, Power amp N/A
  • Power Output: 50Wpc @ 8 & 4 Ohms
  • Signal to Noise Ratio: 103dB
  • Dimensions (H×W×D): 190 × 430 × 480mm
  • Weight: 29kg
  • Price: £12,900, DAC £2,900

Manufacturer

Thrax Audio

www.thraxaudio.com

UK distributor

Lotus Hi-Fi

www.lotushifi.co.uk

+44(0) 788 785 2513

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Stratton Acoustics Elypsis 1512 stand-mount loudspeaker

You don’t often find decent speakers in a charity shop/thrift store, so the fact that Stratton Acoustics co-founder Dave Fowler came across a pair of JBL 4350s in one is just damn bizarre. This experience of a tatty but not inexpensive pair of this gargantuan 1970s studio monitors is what set him down the road that ended up at the mighty Elypsis 1512. In pictures, this speaker doesn’t look as big as it is in real life, nor does it sound the way you might expect, but I will try not to get ahead of myself.

The connection between the Elypsis 1512 and the aforementioned JBL is solely in the size and arrangement of the mid and bass drivers, which as the name suggests are 15 inches for the bass and 12” for the midrange. Driver sizes that went out of fashion when stereo came along and meant that a single giant corner horn or similar was no longer where it was at. At that point speaker makers had to produce smaller boxes and, in the real world at least, those boxes have been shrinking ever since. I saw a tower speaker at the 2023 Audio Show Deluxe show with bass drivers of this scale (Marco Serri Design) but it used multiple smaller mids, the Stratton Acoustics does not compromise its choice of drivers for the sake of a slimline cabinet, quite the opposite.

Stratton Acoustics Elypsis 1512

With some solid industrial design as a foundation stone for Stratton, the acoustic side of the Elypsis 1512 was laid down by speaker guru Phil Ward. His CV includes Mordaunt-Short, Canon and Naim, among others. Phil was initially sceptical about the idea behind this design but when he considered how much professional drive units have advanced in the last decade or so he realised that it had potential, and soon became one of the Founding Partners of Stratton.

Big cones have one significant advantage over their smaller cousins and that’s their large area. It means that they can move air with considerably less excursion (movement of the voice coil). Phil Ward reckons that the midrange driver doesn’t move much more than plus or minus a millimetre even at high domestic listening levels, and the bass units might push that to 1.5mm. They are capable of up to 14mm of excursion but unless you live in a field your ears would be kaput by then.

Power handling

The Stratton Acoustics cabinet is a metre wide by 50cm deep and 90cm high and is constructed from heavily braced birch ply, combine this with an acrylic facia and the selection of drive units and the weight ends up in the region of 140 kilos. But it’s not about brute strength, the midrange has its own sealed enclosure as does the tweeter. The latter is isolated with a polyurethane strip that you can see in light grey around the large waveguide. This guide increases sensitivity and goes some way to matching the dispersion of the tweeter to the huge midrange driver next to it. Large drivers like this tend to beam significantly, the higher the frequency being reproduced the smaller the area of the cones that moves. The tweeter itself has a 29mm fabric dome in a 34mm roll surround, so it’s larger than average and combined with the waveguide this means it has sufficient power handling to keep up with the cones.

Stratton Acoustics Elypsis 1512

Stratton provides level controls for mid and treble, these are in machined aluminium with brass centres and offer plus or minus 2dB of adjustment. This largely because the Elypsis 1512 is such a substantial and thus difficult to move loudspeaker, the plinth which is part of the stand has a cork base making it highly disinclined to slide on a carpeted floor. I got around this with six large furniture sliders under each one, these allowed a degree of tweaking albeit no more than a few inches in any direction. Installation is a remarkably smooth process thanks to company co-founder Ben Richards’ cunning use of shipping crates with wheels and no fewer than three scissor jacks. Each speaker took under half an hour to install and no one’s back was broken in the process, always a bonus with high end audio!

The stands themselves are dramatically modern compared to the loudspeakers, they consist of a plinth which is a bit larger than the speaker and supports two perforated steel ‘legs’. The shapes that are laser cut into the metal legs are in a Voronoi pattern which imitates a dragonfly wing by virtue of having no two holes of the same shape, thus eliminating the potential for ringing.

The stands don’t look strong enough to support the speakers, but in fact they are exceptionally strong, light and rigid – and more than capable of holding up the ‘girthy’ 140kg weight of each loudspeaker. They are also visually discreet enough to make it look as if they are almost floating. Given the original JBL often used to end up resting on house bricks or concrete ‘breeze blocks’, Stratton sets off on the right foot!

Stratton is offering these speakers at three finish levels, Pure is a textured paint finish, Bespoke is the level shown with real wood veneer, this pair in olive, and Absolute “places no limits on what is possible”. So a totally custom build in any fashion you fancy; Stratton say that it’s only limited by your imagination, but I suspect that Dave Fowler’s industrial design background might be of help here.

Dispersion null

One of the qualities that really struck me about the Elypsis 1512 is how good they sound at low levels, I presumed that this was largely due to the high 96dB sensitivity but Phil Ward had this to say: “I suspect one reason might be dispersion. The 1512, due to both its big drivers and its, err, “largish” front baffle area starts to become horizontally directional from about 300Hz upwards. That’s more than an octave below the dispersion narrowing frequency of a typical narrow baffle speaker. The 1512 also has a dispersion null at 90° horizontally off axis due to cancellation from the spaced bass drivers – this also occurs at around 350Hz, so the first side wall reflection to the listening position will likely have a null slap bang in the middle of the voice-band.

Stratton Acoustics Elypsis 1512

“The upshot of all this is the 1512 drives room acoustics rather differently compared to typical narrow baffle speakers – it pushes back the point in the room where the far-field (where reflected sound energy begins to dominate over direct energy) begins. This means that, even at a relatively distant listening position, direct sound will be more dominant. This of course has an effect at all listening volume levels, but anything that reduces the effect of the room is likely to help with the perception of detail and general intelligibility.”

I do not have the luxury of far field listening, the Strattons were three metres in front of the listening position at most. They were not far from the rear wall though, 50cm or so and in a quest for more bass I tried pushing them closer but that started to thicken the sound so they were pulled back again. Phil set them up with the tweeters on the outside and about 30 degrees of toe in, but after a few hours I reduced that by about five degrees to reduce the mid/treble slightly. That resulted in a phenomenally revealing presentation that worked beautifully with decent recordings but was unforgiving of those with dirty or excessive mid/treble energy, so I turned both mid and treble output to minimum and all was well, very well in fact.

I mentioned that these speakers don’t sound the way they look, which is bass-heavy in the ‘dub shack’ style, but unless you play some dub (and why wouldn’t you) they sound as clean and controlled as a well designed high end loudspeaker should, perhaps more so. I tried a push-pull, 350B-equipped tube amplifier and this delivered extremely high transparency coupled with total ease that was only undermined by high mechanical noise from the amp and a higher noise floor through the speakers.

Switching over to my regular Moor Amps 150W power amp proved a good move. The total ease continued along with leaner tone but the balance of resolution and muscularity it delivered was superb. Now I could hear the cartridge warming up track by track and the compression on Hannah Reid’s voice singing ‘Hey Now’ (on London Grammar’s eponymous first album), but also the glory of the track and the juiciness of the bass on it. These may not be bass monsters, but they go all the way down and do so without effort. You get all of the texture, dynamic shading and attack/decay of each bass note without the sense that the system is having to try or that the cabinet is joining in.

Space and time

The Elypsis 1512 may be big but it doesn’t join in with the music in any apparent way. In fact, the mechanical noise floor is extremely low. The ports don’t chuff, the box doesn’t vibrate, and the drivers don’t lose composure even at high levels. They sound so relaxed, you can play them at high volume and not feel that it’s loud, as there is little in the way of ‘loudness’ because of the lack of strain from either amplification or loudspeakers. What you do get is a sense of there being more time to appreciate the music and hearing more of the space within it. Imaging in height and width terms is good but not fantastic and the size of the cabinets means that depth is not resolved as well as the best contemporary floorstanders, but there is nonetheless plenty of space if its on the record.

Even on less sophisticated recordings such as John Lee Hooker’s Burnin’ (recently re-released by Craft Records), the character and power of the performance is placed front and centre. The crudeness of the recording is obvious as is its double mono nature, but the reason why it remains a great listen is not really to do with that, it’s about the soul that the artist managed to lay down in the studio despite all these limitations. Better productions do naturally shine, Joni Mitchell’s Mingus being a great example. Here, Jaco Pastorius’ brilliant bass playing works so perfectly with Joni’s voice and the acoustic guitar, with the bass sounding as articulate and clear as everything else in the mix. ‘The Wolf That Lives In Lindsey’ is a standout from this strong album that’s full of clattering guitar strings and slapped bass, and was one of the many pieces that gave the impression of the Strattons finding more space and time than is usually the case.

Stratton Acoustics Elypsis 1512

Their size made it hard to access the system but I used the Elypsis 1512s to evaluate various source components including the new Melco N5 music server. Melcos generally sound a bit too relaxed when played from their USB outputs for my tastes and I use a streamer to do the conversion to PCM/DSD, here the N5 sounded very good via this connection. It’s a bit more precise than my N10 reference and worked a treat with the Strattons. I also tried slipping three Ansuz Darkz T2 titanium feet under the iFi Pro iDSD Signature DAC. This brought about a shocking increase in bass resolution and power. I’ve tested these feet before but the benefit has never been so dramatic.

Bigger than Japan

A speaker like this attracts fellow enthusiasts as you might imagine and all that visited ended up with broad grins on their faces. One encapsulated their sound as “pleasant precision” which sums the Elypsis 1512s up rather well. Precise speakers tend to be impressive but hard to love whilst relaxed ones are easy to enjoy but lack high resolution, these manage to combine both strengths to a remarkable degree. Another listener suggested playing ‘New Moon at Red Deer Hollow’ by Rain Tree Crow and that proved a very good idea, the bass on that is deep, dark and lustrous, who’d of thought that the band formerly known as Japan could produce such a sumptuous piece.

As you can hopefully tell, I had a whale of a time with the Stratton Acoustics Elypsis 1512s, not least when they were playing at levels you could have a conversation over, here they excelled at least as much as they did at high levels. I hope that other manufacturers and dreamers take note of what Stratton have achieved with this unconventional design, it proves that big can be beautiful in ways that small speakers can only dream of.

Technical specifications

  • Type: three-way, four-driver stand-mount monitor with front-ported bass reflex enclosure.
  • Driver complement: 29mm waveguide loaded NeFeB motor soft dome tweeter, one 300mm selectively hand doped paper diaphragm and NeFeB motor midrange driver, two 380mm paper diaphragm and ferrite motor bass drivers.
  • Frequency response: +/- 2dB 45–18,000 Hz (-6dB @ 28Hz)
  • Crossover frequencies: 350 Hz, 2.5kHz
  • Impedance: 8 Ohms
  • Sensitivity: 96dB/2.83v/m
  • Dimensions (H×W×D): 900 × 1000 × 500mm, with Voronoi stand 1200 × 1100 × 600mm
  • Weight: 140kg/each
  • Finishes: textured black or white, unlimited custom options.
  • Price: from £82,800
  • Stands £5,000

Manufacturer

Stratton Acoustics

www.strattonacoustics.com

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Bowers & Wilkins introduces the 700 S3 Signature

Worthing, UK, 27th March: Bowers & Wilkins only uses the Signature name sparingly, reserving it for the rare and radically upgraded versions of its conventional loudspeakers and technologies. Since the brand was founded in 1966, only eight series of loudspeaker have carried the prestigious Signature mark – a reflection of its prestige and exclusivity.

The new Bowers & Wilkins 702 S3 Signature, 705 S3 Signature and HTM71 S3 Signature models build on a heritage that stretches back to the acclaimed Silver Signature loudspeaker of 1991, originally developed as a posthumous tribute to the founder of the company, John Bowers. The new models build onthe already exceptional performance and aesthetic benchmarks of the standard 700 Series models that form the basis of their respective designs, featuring carefully upgraded componentry plus luxurious and beautiful new finishes.

Perfection, perfected

The larger model in the new Signature range is the 702 S3 Signature, a powerful three-way floorstanding loudspeaker that builds on the specification of the 702 S3, the flagship model in the 700 Series range.

The heart of the design is its Carbon Dome tweeter, housed in a decoupled Tweeter-on-Top aluminium enclosure and enhanced in this model with theaddition of a new protective tweeter grille mesh derived from the 800 Series Signature models, introduced in 2023.

The decoupled Continuum™ Cone FST™ midrange drive unit – complete with its acclaimed Biomimetic Suspension, which notably reduces unwanted coloration emanating from behind the drive unit – ensures clean, effortless insight into the midrange and an open, spacious sound. 702 S3 Signature alsoincludes three 165mm (6.5”) Aerofoil Profile bass drivers for full, powerful sounding bass, complete with upgraded drive-unit suspensions (or ‘spiders’) that help improve bass clarity.

As with all Signature models over the years, the 702 S3 Signature benefits from careful upgrades to its crossover aimed at further increasingtransparency, with new and upgraded Mundorf capacitors, improved inductors and revised bypass capacitors. Finally, it includes new andupgraded speaker terminal posts featuring high-quality brass cores that ensure a cleaner flow of signal into the speaker.

The Best of our Best

The 705 S3 Signature brings new standards of performance and capability in a smaller, more room- friendly form factor than its mighty sibling. Aswith the larger 702 S3 Signature model, the 705 S3 Signature also includes an all-new tweeter grille mesh for more openness and transparencyplus an upgraded crossover with new capacitors and resistors plus rearranged bypass capacitors. It shares the improved speaker terminals from 702S3 Signature and also includes an all-new drive-unit suspension (or spider) for its 165mm (6.5”) drive unit, ensuring both a cleaner midrange andmore extended bass.

Our most extensive Signature range

For the first time, home theatre enthusiasts can access the beauty and performance of Signature technology. The new 700 S3 Signature range includes a dedicated centre-channel loudspeaker, the HTM71 S3 Signature. A three-way design, it features the same Tweeter-on-Top assembly asboth the 702 and 705 S3 Signature models, ensuring the best possible integration with the performance of its siblings.

This is complemented by a centrally mounted 130mm (5”) Continuum™ Cone FST™ midrange drive unit, also featuring decoupling and Biomimeticsuspension. Finally, twin 130mm (5”) Aerofoil Profile bass cones give the HTM71 S3 Signature its powerful, fully extended presentation. Comprehensive upgrades to both its crossover components and its input terminals complete the HTM71 S3 Signature’s performance- orientated specification.

Exclusivity celebrated

To properly identify their prestigious position within the Bowers & Wilkins portfolio, both the 702 S3 Signature, 705 S3 Signature and HTM71 S3 Signature are only available in two exclusive Signature finishes, complemented by unique identifying Signature logo plates on their rear panels. The Midnight Blue Metallic paint is the same as offered on the iconic Nautilus loudspeaker andthe 800 Series Signature models. Alternatively, all three loudspeakers can be purchased in a lustrous Datuk Gloss wood veneer. Exclusive to the new700 Series Signature models, both finishes feature vibrant gold trims to their drive units and tweeter housings, further highlighting their Signaturestatus.

As with all Signature loudspeakers over the decades, all three new 700 Series Signature models are the perfect embodiment of Bowers & Wilkins’ product philosophy and are a proud addition to the brand’s heritage in this category. The engineeringteam at Bowers & Wilkins remains passionate about providing the best, truest listening experience available, and the 700 Series Signature modelsare the next step towards achieving this goal.

Commenting on the launch, Dave SheenBrand President of Bowers & Wilkins said: “Any Signature launch is an incredibly proud moment foreveryone at Bowers & Wilkins. The new 700 Series Signature range represents a significant expansion of our Signature portfolio and I’m sure it willbe enthusiastically received by both reviewers and our customers worldwide.”

Available from 27th March from selected dealers, 700 Series Signature is available in two special finishes:

Midnight Blue Metallic and Datuk Gloss.

702 S3 Signature

$9000 | €8500 | £7000 per pair

705 S3 Signature 

$4500 | €4000 | £3400 per pair

HTM71 S3 Signature

$3300 | €2500 | £2200 each

Paul Messenger 1949-2024: A personal tribute

Like many in my trade, I have known Paul Messenger for years. I admired and respected his writing long before I started sitting at a keyboard for a living.

He could have easily been an intimidating character to a young writer starting in audio in the early 1990s. Paul had already been involved in the business for more than 15 years. He had been one of the critical agents of change in the 1970s; before he started work on Hi-Fi News and Record Review, sound quality was a secondary consideration next to measurement. He changed all that. Faced with someone who redrew the audio map so significantly… what if he was an ego-maniacal monster?

But this was Paul.

Paul Messenger was one of those people who was easy to like. Something was calming about his presence. Perhaps it was his good humour and that rumbling giggle that came so quickly. Or maybe it was his natural and easy-going charm. Or, possibly, the smell of freshly roasted coffee and freshly baked croissants that greeted everyone who visited him. It was probably all these things and more. But of the many obituaries I’ve had to write in editing this magazine, this one perhaps hits the hardest.

I worked with Paul Messenger on dozens of blind loudspeaker group listening tests for Hi-Fi Choice magazine throughout the 1990s. Such tests could easily be a chore; travelling across the country to dead-lift loudspeakers in and out of a room while a group of middle-aged men passed judgment on them from behind a curtain is probably not the stuff of scintillating conversation. Yet, Paul always kept it fun and friendly. There was always the lunchtime sausage & bean hotpot and the beer from a nearby Michelin-starred pub. But most of all it was the company. Paul was always a fascinating person: quick-witted, good-humoured, entertaining, and always generous of spirit. This is why almost every Public Relations person who invited him to a press conference has stories of him turning up wearing a ‘bullshit detector’ T-Shirt and a big smile.

The least audiophile

Paul was, in so many ways, the least ‘audiophile’ audio enthusiast you could meet. He wasn’t the obsessive-compulsive person who’d repeatedly play the same 30 seconds of music to make that system sound right. Instead, he was the kind of guy who got things right, but there was no point obsessing over such things… because there was music to be played! But he was always keen to experiment. For example, in the ‘in wall’ event, he got a pair of 12” dual concentric drivers from Tannoy and quite liked the idea of mounting them in the wall of his listening room. He forgot to tell anyone he was planning this until the sledgehammer started swinging…

In later years, I rarely had the opportunity to visit him. Occasionally, I’d see him at a press launch or show or visit his house to collect or deliver some audio. Often, we’d sit and talk nonsense for a while, and we’d play some music. We’d take turns to discover new music and sit in that airline seat from way back that he’d bolted into his listening room. The music would flip from folk to techno to rock and just keep going.

I hadn’t seen Paul for a few years when I got the call you never want to hear. The pressures of work keep you apart from friends and family, and Paul’s illness meant he wasn’t the same vibrant person you used to hear down the phone. We had hoped to meet this spring while he could, but sadly, that was never meant to happen.

He passed away listening to The Grateful Dead with his family around him. That evening, those who knew and loved him listened to ‘Ripple’. If you liked his writing or met him… why not do the same tonight?

Our thoughts go out to Pam and his family and friends.

Image by Chris Frankland

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Cyrus Audio announces update to the very popular Phono Signature

March 21, 2024 – The original Phono Signature has gained a lot of vinyl fans from around the world since it launched back in 2016, so it comes as no surprise that Cyrus is announcing an update to this true classic.

“We wanted to make sure that an update to this popular phono stage did not unnecessarily push up the price and that it remained very much a part of the new Classic series. A year of work from our R&D team has enabled us to re-examine all areas of the Phono Signature and carry out updates where possible, but it is difficult to improve on what we believe has been one of the best performing phono stages at any price point. The baseplate has also been updated in line with the Classic AMP, PRE, STREAM and POWER, which provides improved mechanical isolation as well as greater immunity to external electrical interference, which is vitally important when it comes to the accurate reproduction of audio.” said Chris Hutcheson, Head of Marketing at Cyrus.

Even though this is most definitely an update rather than a re-design, we feel that it is very encouraging that Cyrus has kept the price of the Classic PHONO in line with the original Phono Signature, continuing to bring this popular phono stage to vinyl fans at a very competitive price point.

The new Classic PHONO is available at £1895 and is in stock and available to order immediately. Alternatively book a demo session with your local Cyrus specialist to experience this popular phono stage for yourself.

To find out more about the Classic PHONO or other products from the Cyrus range, you can visit www.cyrusaudio.com.

Album Review: Orbital – Optical Delusion

It’s hard to believe, but Optical Delusion is the Hartnoll brothers 10th album in a career that spans more than 30 years… albeit with a few breaks to recharge their iconic torch glasses. This isn’t the 30th anniversary album planned by the techno duo (COVID-19 got in the way of that) but instead is a more collaborative affair, working with artists new and old.

The album also reflects Phil and Paul Hartnoll’s sociopolitical and geopolitical stance, especially in the choice of collaborators. It’s clear, for example, which side of the political divide they align to when the first single from the album was their work with Sleaford Mods; ‘Dirty Rat’. Meanwhile, ‘Ringa Ringa’ (with The Mediaeval Baebes) takes the old plague-inspired nursery rhyme and fast forwards it to COVID-19. The Mediaeval Baebes and Sleaford Mods aside, Anna B. Savage, Dina Ipavic, Penelope Isles, The Little Pest, and Coppé also feature… that’s more featured artists than the rest of Orbital’s previous albums combined.

Strangely, although it was ‘Dirty Rat’ that both drew me in and was the sneak preview of the album, it’s probably the weakest track, both for Orbital and Sleaford Mods. It’s a heavy-handed rant with a relatively simple backbeat from a band known for their lyrics meeting one known for their complex polyrhythms. It’s also a political polemic that sticks out a little far in an otherwise more nuanced album. It works… but there are stronger tracks and both Orbital and Sleaford Mods are better than this. That being said, it’s one heck of an angry rant, with lines like ‘the resin-coated dead egg of nowhere’ shining a light of intense frustration on those parts of the UK in deep decline.

Staying with the ‘featuring…’ tracks, one of the best is ‘Home’ featuring Anna B Savage, an English singer-songwriter who is herself worth following (think Nick Drake meets PJ Harvey). ‘Day One’ with Dina Ipavic is also good and arguably the least Orbital-like track on the album, with ‘Are You Alive? (feat. Penelope Isles)’ appealing half and half to both hyperpop and die-hard Orbital fans.

However, it’s when Orbital step back to what they know best is when this album shifts into higher gear. Crunked up instrumental tracks like ‘The New Abnormal’ and ‘Requiem for the Pre-Apocalypse’ are classic Orbital; intelligent electronica chord progressions with fast, yet ageless drum ‘n’ bass, played with enough dynamic range to sound relatively easy on the ears, yet powerful enough to be expected to be played at clubby levels, and one hell of a break too. It’s almost nostalgic for the clubbing experience of the 1990s, but still fresh in that distinctly Orbital style.

The album closes with ‘Moon Princess’ featuring legendary Japanese electronica artist Coppé, an ethereal number that could have easily been something out of Blade Runner or Akira, yet entirely classic Orbital.

The worry here is I’ve used the term ‘classic Orbital’ a lot; it could easily be an album of the Hartnoll brothers ‘phoning it in’ and making something samey bordering on the stagnant, like they forgot to reset the synth and sequencers. It’s a potential problem with electronica; there’s only so much a band can sequence before it sounds like it’s sampling its back catalogue. On the other hand, radically changing style often means disenfranchising your core. The narrow path between these two is hard to follow, but I think Orbital have achieved it. The more you listen to the album as a whole, the more you are drawn into their world, and it has changed. The collaborations might not all work, but they add an atmosphere of experimentation and exploration that perhaps began with 2018’s Monsters Exist. I didn’t find that album as explorative as Orbital Delusion, so there is more going on here.

OK, Optical Delusion is no In Sides, but my experience of that album is hugely shaped by hearing ‘P.E.T.R.O.L.’ a gazillion times while playing WipEout on the PlayStation for months on end in the mid-1990s. And, given the subject matter of this issue, Optical Delusion sounds damn fine on double xLP, too. It’s got some bangin’ tunes and will be on the platter for some time!

Back to Music

Monitor Audio Hyphn

You may not yet be 50 years old, but I bet you’ve passed a significant birthday or two nevertheless. What did you do to mark the occasion? Buy yourself something nice? Throw a party? Or maybe let other people do all the buying and the throwing? 

When Monitor Audio celebrated its 50th birthday in 2022, it did so by inviting its design and engineering teams to go to town on the entire idea of the passive loudspeaker. To forget the last century of orthodoxy and to reimagine the whole concept of what a passive loudspeaker might be – but to do so without ruining either the balance-sheet or the hard-won reputation the company has spent five decades establishing.

The result was ‘Concept 50’ – a design altogether more innovative and interesting than the name it was given would suggest. 

Concept 50 did the rounds of the planet’s hi-fi shows, and was met with acclaim pretty much everywhere it appeared. So much so, in fact, that Monitor Audio decided to put this radical and radical-looking loudspeaker into production. And with its balance-sheet and reputation no doubt uppermost in its mind, it probably did so with that feeling of queasiness and excitement that always accompanies big, risky decisions.

Name change

‘Concept 50’ is now ‘Hyphn’ – but in almost every other respect, this looks like the same loudspeaker that was originally intended to be a design study and a conversation-piece. Beneath the skin, though, a fairly fundamental reassessment has resulted in a speaker of far greater acoustic potency than the prototype on which it’s based. And yes, it’s big and expensive – but it’s by no means as big or as expensive as any number of alternative loudspeakers from any number of alternative brands. It’s safe to say, though – and with no hyperbole – that it’s unlike any other passive loudspeaker you’ve ever encountered. 

Yes, it’s a singular design – that much is apparent just by looking at it. And I don’t doubt the creative types at Monitor Audio were delighted to find the engineering approach the company wished to take allowed for such an unusual aesthetic. But Hyphn is no triumph of style over substance – this loudspeaker comes from first principles. Its appearance almost entirely follows its function.

In architecture, a ‘hyphen’ is a link connecting two separate structures. Fittingly, each Hyphn loudspeaker consists of two separate enclosures joined by the ‘M-Array’ multi-driver assembly – each enclosure has a bass reflex port at the bottom and two 103mm bass drivers facing inwards in a ‘force-cancelling’ arrangement. 

Monitor Audio Hyphn

These bass drivers are the third generation of Monitor Audio’s ‘Rigid Diaphragm Technology’ cone, and feature ceramic-coated aluminium magnesium for the front skin while the rear consists of two uniform layers of carbon fibre skin to reduce breakup. Optimised cone-edge treatment and rubber surrounds contribute to the light, strong structure. The RDT II boasts the lowest distortion of any cone Monitor Audio, and here they’re fixed in place by inch-thick metal rods and bolt-through fixings that run through the width of the cabinet to the rear of the driver. 

Stone me!

The cabinet (or, rather, cabinets) of each Hyphn loudspeaker is/are made of an acrylic stone material – it’s seamless, thermoformable and – once it’s been milled and hand-finished – almost eerily smooth. Monitor Audio chose it for its rigidity and inertness – it’s 12mm thick, and in the area around the force-calling drivers that doubles to 24mm. This allows the multiple drivers to perform at their optimum – so the fact that the cabinet material happens to look and feel so singular is almost certainly just a happy coincidence. Each Hyphn weighs just shy of 107kg, it’s true – but once they’re in position that ceases to be an issue. As long as your flooring is equal to the task of supporting them, anyway. 

(The extraordinarily static characteristics of the cabinets, coupled with the bass driver arrangement that delivers an equal and opposite reaction force, means the Hyphn is, to all intents and purposes, vibration-free no matter the pistonic activity that may be occurring.) 

Monitor Audio Hyphn

The ‘M-Array’ that forms the link between these two towers is an extremely compact and profoundly complex multi-driver midrange and tweeter assembly. Its painstakingly detailed design allows six RDT III 51mm midrange drivers to surround a third-generation ‘Micro Pleated Diaphragm’ transducer. The idea is to offer exemplary off-axis performance at the same time as class-leasing acoustic transparency and soundstage clarity. 

The MPD II transducer has a passband in excess of 60kHz, and its square radiating area is designed to produce equal directivity in the vertical and horizontal planes. The rear volume is carefully designed to minimise ripple in the audible frequency range, and there’s a bespoke waveguide for controlled directivity and, consequently, improved soundstaging. 

Six speaker special

Combined, the six midrange drivers have a surface area slightly larger than that of the RDT III midrange driver fitted to the Monitor Audio Platinum 300 3G reviewed in Issue 213. This midrange driver line-up has been created to achieve the largest amount of surface area with the smallest footprint, with the intention being the lowest possible distortion with the widest radiating area. It also benefits from considerable upper-frequency extension, and is able to cover a fair amount of the frequency range that would ordinarily be the responsibility of the tweeter – so the crossover point can be moved to 3.7kHz, where it’s less apparent. And because the MPD III transducer’s waveguide is fixed and the six midrange drivers form a flat baffle around it, there’s vanishingly little intermodulation distortion. 

 The crossovers themselves have come in for the same sort of obsessive overthinking as the rest of the Hyphn components. The inductors, for example, are baked in varnish – this binds the wires together and reduces vibration and mechanical resonance. Ceramic wire-wound resistors are doubled and, in some areas, quadrupled to ensure power handling up to 800 watts and to reduce power compression. The bass, midrange and high-frequency sections use individual PCBs, minimising crosstalk and magnetic fields, and are mounted on rubber isolation feet to minimise vibration. 

Monitor Audio Hyphn

Yes, it’s a tale of excessive this, thoroughly engineered that and overspecified the other – but the result is a loudspeaker that’s nothing like as esoteric or demanding as you might be expecting. Sensitivity is an unremarkable 86dB (2.83Vrms @1m) and nominal impedance is 4 ohms with a minimum of 3.5 ohms at 2.2kHz. Hyphn may be capable of handling 800 watts of continuous power, but Monitor Audio is adamant that 200 watts of clean power is sufficient to bring the best from this loudspeaker.

For our purposes, of course, that’s altogether too tentative. So this test is conducted using a pair of Audiolab 8300MB monoblocks with a Meridian G86 serving as a preamplifier – a Bluesound Node 2i provides the necessary streaming smarts. Monitor Audio is at pains to point out that equipment to partner a pair of Hyphn could easily be a little less, or considerably more, expensive than this without any problem – but the company is confident, and more than happy to use what is relatively modest amplification to drive these über-flagship speakers. 

Content is all streamed, in file sizes that range from 320kbps to 24bit/192kHz and (the late and partially lamented) MQA. Music ranges from The Daily Growl by Lambchop and When I Was Older by Billie Eilish to Gershwin’s Rhapsody in Blue by The New York Philharmonic under Leonard Bernstein and Theme from Ernest Borgnine by Squarepusher – and quite a few points in between. 

And while it’s safe to say the Monitor Audio Hyphn are at their best when streaming a fat and information-rich high-resolution file of an expensive and painstaking recording, they’re in no way snobby. If they’re given a compressed file of a cheap and/or radio-friendly recording, they’ll find the virtue in it. Their attitude is one of enthusiasm and they’re not overtly judgemental.

Low-frequency extension and presence is considerable, and the weightily powerful bass the Hyphn produces is loaded with detail both broad and fine. The rapidity of which they’re capable is profoundly impressive – the sort of nosebleed-inducing low end of the Squarepusher tune, for example, might seem designed to befuddle a loudspeaker, but the Monitor Audio simply show it who’s boss. The precision of the low-frequency attack is remarkable – bass is straight-edged in its attack, while decay is weighted precisely. As a consequence, there’s absolute confidence and positivity to the way these speakers express rhythms – no matter how hectic or how languid they might be. 

Assertive and informative

The top of the frequency range is equally assertive, equally informative and subject to a similar sort of control – which is all the more impressive when you remember just how outnumbered and outgunned that MPD III transducer is. Treble attacks crisply, is tonally convincing and has the sort of attention to detail that makes the specific thickness of, say, a ride cymbal completely apparent. 

The crossover between low-end and midrange, and from midrange to top end, is so smooth as to be indiscernible. And in the midrange, the Hyphn communicate to an almost indecent degree – they are as eloquent and revealing as it gets when given a vocalist to deal with, and what they don’t identify and reveal about timbre, technique and straight-up attitude in a voice isn’t worth knowing. They manage to make a close-mic’d vocal line sound intimate and wide-open at the same time, and have the sort of articulacy that makes every listen an authentic event. The harmonic variations in a singer’s voice that occur either side of the fundamental are given due prominence – but none of this insight or analysis is at the expense of engagement or entertainment. 

Dynamic headroom is considerable – which won’t come as much of a shock. The Hyphn retain every scrap of information when listening to small-scale recordings at modest volume levels, and maintain their composure when a tune gets raucous or multi-faceted – even at significant volume (and let there be no doubt, the Hyphn are capable of significant, almost oppressive, volume).

Monitor Audio Hyphn 

Perhaps most gratifying of all, though, their powers of resolution or their ability to motor through the most testing rhythms or tempos without alarms, is the way the Hyphn organise and present a soundstage. But despite the generous size of stage the Monitor Audio can describe, it’s sharply focused and entirely convincing. The Hyphn pay due attention to the spaces and the silences on the stage, keep every element of a recording secure in its own little pocket or area, generating a remarkable impression of distance in both the left/right and front/back planes. 

The Singularity

That separation is such that any individual strand of a recording is easy to isolate, the Monitor Audio integrate every aspect of recording in the most natural and confident way. Music, even cut’n’paste collages or those recordings that only ever existed in their creator’s laptop, is presented as a unified and lucid whole. A singularity, a performance. 

It follows that the Monitor Audio Hyphn are among the most impressive loudspeakers around, at any price. Obviously they’re impressive in concept and in the uncompromised manner in which they’ve been executed, and obviously they’re impressive in their appearance. But there’s an almost instinctive correctness, a sort of casual-yet-unerring sensation of faithfulness, to the way they sound that makes the greatest impression. 

There’s nothing new under the sun, of course, and in the final analysis the Monitor Audio Hyphn is simply a pair of passive loudspeakers with a great many drivers and a giddy price-tag. But as an indication of both where a company has been these last five decades and where it might go in the next five, Hyphn stands alone. 

Technical specifications

  • Type: 3-way, eleven-driver, floorstanding speaker with bass reflex bass alignment
  • Driver complement: 1× MPD III micro-pleated diaphragm tweeter; 6 × 51mm RDT III rigid diaphragm technology midrange driver; 4 × 103mm RDT III rigid diaphragm technology bass driver 
  • Crossover frequencies: 350Hz; 3.7kHz
  • Frequency response: 18Hz–60kHz
  • Impedance: 4Ohms
  • Sensitivity: 86dB/W/m
  • Dimensions (H×W×D): 1392 × 502 × 520 (including spikes)
  • Weight: 107kg/each
  • Finishes: Matte black; matte Heritage green; pure satin white
  • Price: £70,000/pair

Manufacturer

Monitor Audio Ltd

www.monitoraudio.com

+44 (0)1268 740580

Back to Reviews

Russell K. RED 150Se

We reviewed the original Russell K. RED 150 here. The RED 150Se is a ‘breathed on’ version, introduced in 2019 and offering some significant improvements over the standard version.

The Russell K. range starts with the RED 50 bookshelf at £1,995, but the RED 150Se is the flagship model at £8,495, with the standard RED 150 below it at £6,795. I am very familiar with the RED 120Se in the range, and the RED 120Se and RED 150Se share the same tweeter, but the more substantial 150Se uses larger 165mm bass drivers.

Nice sounds all round

I heard these making some very nice sounds at a hi-fi show and they did not disappoint in my home system, producing an excellent performance at their price, all of which whetted my appetite to try the larger 150Se as soon as I could persuade the editor to play along. Which luckily he did, and so here I am with a pair of them in my listening room in a rather handsome piano white finish.

Russell K. itself arrived on the hi-fi scene relatively recently, in 2014, but founder and designer, Russell Kauffman traces his routes back further with considerable experience working for such top British loudspeaker names as B&W, Wharfedale, Monitor Audio and Morel.

Russell K. RED 150Se

During my initial chat with Kauffman about the speakers, he recalls how when he first started out, he wanted to design something that has a distinctive sound. He may not have had access to the kind of R&D budget of some of the big boys, but he used his ears as well as measurements to determine the final designs and during his time working for the big names, learnt many lessons, including which approaches and ideas he felt did not work, and these principles and learnings run through the entire range of Russell K. speakers from top to bottom.

The BBC legacy lives on

One key area is cabinet construction. He recalls BBC research which found that stored energy in rigid, heavy cabinets can cause coloration. Kauffman has found the same and so prefers to use thin-walled cabinet without lots of damping panels stuck to them and he controls cabinet flexure instead by using internal bracing shelves with multiple holes drilled in them – three of them in the RED 150Se, there’s one between tweeter and bass/mid driver, one between that and sub-bass driver and one situated below the sub-bass driver.

Russell K. RED 150Se

As well as the two reflex ports on the front panel, there is also a third, internal reflex port mounted on a fourth shelf, which vents into a small internal cavity and then through the twin ports, which are tuned to 21Hz.

The bracing shelves are also designed to drastically reduce midrange standing waves and make sure that no midrange energy makes its way out of the port tube and only bass escapes into the full volume of the enclosure. The shelves also mean he does not need to stuff the cabinets full of acoustic wool or BAF wadding in a bid to absorb reflections and standing waves. This too, he tells me, has helped to improve the sound of the speakers.

Kauffman tuned the bass/mid and sub-bass units to work together by adjusting the number of holes in the internal shelves. The system, he says, provides a strong braking effect around 100Hz, which helps provide the kind of tight, controlled bass normally associated with a good sealed box design.

The keen-eyed among you will spot that the two 50mm diameter ports on the front panel are not the same length, one is 50mm long and the other is 170mm. Kauffman confides to me that during development, when he would use a rolled-up brochure in the port to determine the ideal length and tuning, and discovered quite by chance the 150Se sounded better with one port longer than the other. He says he could measure no difference, but he believes it helps to control phase and in any case, it just sounded better. So he left it that way.

Simple, not simplistic

Another central tenet of his design philosophy is a simple crossover. He believes there is “a lot of rubbish talked about crossovers in the hi-fi industry”. He says that many assume that you connect a coil to a woofer and you get a 6dB/octave roll-off but, he says, in reality you don’t because of the natural roll-off of the driver itself. Many speakers have a separate circuit to control what the driver is doing, but that is not Kauffman’s way. He uses a nominal 12dB/octave circuit but the values of the components used are not text-book and are tuned to get the roll-off he wants, which, he adds, means that when the tweeter comes in, it is wired and playing in phase. This, he says, to his ears, gives the best sound and the values of components used were arrived at after listening to a combination of speech and music.

Russell K. RED 150Se

Kauffman also has another secret in his crossovers. He does not like air-cored or ferrite-cored inductors used in series with the bass and bass/mid drivers. Kauffman dislikes air-cores as you need more turns of wire to get the same inductance, so they have a higher DC resistance, which he believes has an adverse effect on an amplifier’s damping factor. He also dislikes ferrite cores as he says they radiate energy like an antenna, affecting the performance of other components on the circuit board. Kauffman’s solution is Enclosed Field Iron Cores inductors, which he says have very low DC resistance and don’t pollute the crossover with radiated energy.

He also makes a point of listening to all of his drivers outside the cabinet, in free air, fed with a full-range signal. This, he says, allows him to judge the qualities of each driver more accurately.

So how does the RED 150Se differ from the standard 150? First, it has a new, upgraded 25mm soft dome tweeter, with a ferrite magnet system with copper clad aluminium voice coil wire on a fibreglass former with Faraday distortion cancelling copper ring. It has a metal face plate instead of the plastic one used on the standard 150. It has a higher output level and so the crossover had to be tweaked slightly to achieve the best match with the bass/mid driver. It has a new, bigger 30mH coil in the crossover for the sub-bass unit. The other difference is that the RED 150Se gets a new plinth and spikes.

Apart from that, the other attributes of the 150 are unchanged. The cabinet is made from 16mm MDF with 19mm for the front baffle, and it is totally undamped with three internal bracing shelves to control internal standing waves. It also uses the same internal reflex port. The reflex system is tuned to 21Hz. The two 6.5in woofers have impregnated paper cones and a 25mm voice coil with aluminium former and Faraday distortion cancelling copper ring. The crossover for the tweeter includes a (deliberately) misaligned Zobel network for tweeter attenuation and frequency shaping, and each driver has only one component in the signal path.

An easy load

Sensitivity for the RED 150Se is 87dB and it is designed to present the amplifier with an easy load. I used an Audio Note Meishu Tonmeister for my listening. Eight watts of single-ended 300B valve power is enough for the 150Se, as I have used it to drive the RED 120Se very successfully, and they are 1dB less efficient.

My source components were an Audio Note TT3 turntable with PSU3 power supply and Arm2/Io1, feeding an S9 transformer, aided and abetted by the same company’s CDT Five CD transport and DAC5 Special.

I know my room well and generally I know the sweet spot that works best with most speakers, and having got great results using the 120Se 280mm from the back wall and 350mm from the side walls, that is where I put the 150Se to start with. I spent some time inching them around one way and the other, but on balance what worked for the 120Se also worked for the 150Se. As with the 120Se, the system of four spikes (each halfway along each side) allowed the cabinets to sit level and firm on my wooden floor.

Still crazy after all these years!

When you have been reviewing for as many years as I have, I have got to be honest and say that almost from the first few bars of music, you can tell if something is good, bad or indifferent, and so it was that the first few bars of ‘A Place for Skipper’ from guitarist Larry Carlton’s Discovery album put a broad grin on my face and had my foot tapping along to the beautiful, growly bass line from John Peña. Discovery was the second of two albums – the first was Alone But Never Alone – that caused quite a stir at the time among fans of the guitar wizard as they saw him playing all acoustic rather than the electric guitars for which he was famous. After all, the man is known as ‘Mr 335’ (Gibson ES335, that is). And we can hardly be surprised that this talent shines through just as well on acoustic as on electric, and the RED 150Se conveyed the easy lilt of this track beautifully and allowed me to hear every nuance of his play and how each note was shaped. Drums and percussion were similarly detailed and articulate and the whole track just grooved.

Russell K. RED 150Se

I then played ‘Hurts So Good’ from John Mellencamp and was impressed at the sheer impact of the drums. which were tight and dynamic, while Mellencamp’s vocals were full of emotion and grit, but without any harsh edges. The track flowed well and the bass line moved well and the track was musically engaging.

I then tried a beautiful 1968 recording from The Mose Allison Trio called Black Country Suite for Piano, Bass and Drum. This album, despite its age, is a lovely recording and has possibly one of the best drum and cymbal sounds I have heard. On the 150Se, cymbals were open, dynamic, detailed and really rang out, while Mose Allison’s beautifully fluid piano play was conveyed with all of its intricacies. The bass line too moved and kept the track moving along. I could not have asked for more from the 150Se, which took it all in its stride with an easy musicality.

Spinnng up Dave Koz’s Saxophonic on the CD player, the track ‘All I See Is You’ was masterfully handled with great body, bite and dynamics to Koz’s tenor sax, while drums had great snap and control and the bass line had great weight and tunefulness. The 150Se separated out the various threads of the track coherently and allowed each musician’s contribution to the whole to be plainly heard.

The 150Se’s ability to capture the musical integrity of a track also came over on ‘Didn’t It All Come True’ from Ben Sidran’s Bop City, where the sound was wonderfully dynamic and really motored along apace. Bass lines were deep and tuneful, drum beats were powerful and tight, while Sidran’s piano play was fluid and full of artistry and his vocals conveyed with their signature poise and swing.

Greatly impressed

By now you will have gathered that the Russell K. RED 150Se impressed me a great deal with their capabilities and I enjoyed listening to everything I played on them. They are musical, convey the rhythmic impetus and structures of the music well and combine those with an insight into the intricacies of what each musician is playing, so that the whole gels together into a musically captivating experience.

Russell K. RED 150Se

If you have around £8,500 burning a hole in your pocket and musical satisfaction is your desire, then you would do well not to overlook the RED 150Se. They are a class act. 

 

Technical specifications

  • Type: 2.5-way three-driver reflex-loaded floorstander
  • Driver complement: 25mm soft some tweeter, 2 × 6.5in impregnated paper cone bass drivers
  • Frequency response: 20Hz–22kHz
  • Crossover frequency: 2.2kHz
  • Impedance: 8 ohms
  • Sensitivity: 87dB/1W/1m
  • Dimensions (H×W×D): 950mm (1000mm including plinth/spikes) × 240mm × 250mm
  • Weight” 28kg
  • Finishes: Oak, Walnut and Black Oak, real wood veneers
  • Price: £8,495 per pair

Manufacturer

Russell K.

www.russell-k.com

+44(0)7831 481527

Back to Reviews

Russ Andrews BMU 3000 Mk II

The Russ Andrews BMU 3000 Mk II – like the Connected Fidelity AC-2K – is a balanced mains transformer. Instead of a Live wire at around 240 V AC and Neutral at or close to ground potential, in the BMU Live and Neutral are reset by a transformer to +120 and –120 V, relative to earth. Similar to balanced audio feeds using three-wire XLR connections, using two power lines mirrored about a central earth provides common-mode noise rejection. 

The first BMU (Balanced Mains Unit) was launched in 2008, designed and built for Russ Andrews by transformer expert Paul Houlden and built around a massive 3000 VA toroidal transformer. This was housed in a metal box with two UK mains outlets. In 2018 the BMU was replaced by the Mk II, still using Houlden hand-finished toroids but with the Russ Andrews Accessories company assembling the finished unit, now in a lower-profile case. 

Russ Andrews BMU 3000 Mk II

In total three versions are currently available: the entry-level uses a single 1500 VA toroid, while the unit reviewed here has two such transformers wired in parallel, for an overall rating of 3000 VA. The black all-ABS cabinet is the same between these two models. For the larger 3000 model, the toroidal transformers fit side-by-side. 

Filters

Besides the new box, the Mk II adds mains filtering, placed before the transformers. Wired across the IEC inlet, this is also sold separately as the DIY RA Silencer, and is designed to remove mains noise. It’s listed as a passive differential and common-mode inductorless non-resonant harmonic filter. Although not essential, the company recommends it is serviced every five years.

Across the back panel are five UK mains outlets in the form of RA’s custom-made UltraSockets. These are deep cryogenically treated and finished with DeoxIT contact enhancer, and are mounted inverted, to help wiring when the unit is sited close to the ground. Kimber Kable is listed for internal wiring, although this is only used to wire together the mains outlets, daisy-chained, including the earth connections.

A third version of the BMU is the Install version, also rated at 3000 VA with two transformers, only in a metal dust-proof cabinet without three-pin outlets or filters. As the name suggests, this is designed for permanent hard-wired installation, typically as part of a dedicated spur from the consumer unit to the system.

All units include two forms of safety feature. Thermal fuses are built into the toroids should they suffer a catastrophic short, and will trip when internal temperature rises above 90°C. And a magnetic circuit breaker (MCB) is fitted into the power switch attached to the back panel. This switch is wired from the secondary side of the transformer, meaning the transformers are always ‘on’ regardless of switch setting. The MCB cuts power in the event of a fault on the mains wiring.

Tap talk

After ordering and before delivery, RA Accessories sends a digital voltmeter to the customer in order for them to check local line voltage. According to the company, ‘each Balanced Mains Unit can be set so that it matches your incoming voltage. This is very important to minimise excessive transformer noise. The custom transformers are incredibly efficient so if a higher or lower than average voltage is fed to them, this can be converted to mechanical noise within the transformers’.

OEM maker Paul Houlden told me that taps are used enable output to be adjusted, such that a customer receiving 220 V could raise this to 235 V, for example. Or, conversely, a ‘hot’ incoming level of 250 V could be dialled down. Adjustments are possible using a combination of taps on the transformer primary windings. 

Russ Andrews BMU 3000 Mk II

The taps used to be user-adjustable, with owners able to try up to four settings by connecting together different colour-coded wire taps from the torus until they found a match producing the lowest hum.

Hands on

After taking readings over a few days, it was confirmed that my house receives a nominal 240 V, and the review sample was duly shipped. Measuring the unit’s output showed a typical 4 V drop, to 236 V, suggesting it may be configured as exactly 1:1, allowing for a 2% loss through the transformers, which would agree with the circa-98% efficiency figure quoted by the maker.

There is no surge protection or soft-start mechanism, and on several occasions it tripped the RCD in the consumer unit. The new Mk II features re-designed internal transformers with the result said to be quieter operation and more efficiency than before. In practice, the transformers – hard-mounted to the chassis on a thin sandwich of foam – were often audible. This was not a constant noise, but was relate to mains quality.

Russ Andrews BMU 3000 Mk II

The rattly buzz, comprising mainly 100 Hz plus a long tail of harmonics, would slowly rise and fall in volume, at peak loud enough to be heard not just in the gaps between music but over the music too, from across the room. To test for stray DC on the mains, I wired in-line an Audiolab DC Block 6, which cured the buzzing immediately. And to test if this phenomenon was localised in my home, I tried a neighbour’s supply in the same building, running from a different leg of the national grid three-phase supply. The noise was identical. However, while an obvious solution might be to a add DC-blocking capacitor, Russ says it affects musicality. As the AC-2K (which was always silent), ripened the bass in a way the neutral BMU 3000 Mk II did not, he may have a point.

Sound

Without doubt, the sound quality from the system while using the BMU 3000 Mk II improved palpably. One is tempted to say that it is ‘transformative’. As I discovered with the Connected Fidelity AC-2K, there was a relaxation effect, with instrumentation sounding smoother, more natural and flowing. Stereo space became holographic. It’s that feeling of calm, like stepping into a soundproofed room deprived of daily ambient noise. 

Various permutations of connection were tried using the BMU powering either the whole system, just the source components, or just the power amplifier. Perhaps the most satisfying was with an Evolution-300 PowerKord from wall socket to the BMU, feeding the power amp, and phono stage wired straight to wall. In all settings however, the BMU 3000 Mk 2 was less colored, and better able to preserve the slam and pace found with a direct wall connection.

Conclusion

In conversation with Paul Houlden, his worst hum-related complaints have been from customers living in London, which may have particular issues with grid DC. Unfortunately it’s not always trivial to fix, so a BMU may not be viable for someone in affected areas. While the BMU can show a staggering subjective improvement in perceived playback ‘hush’, paradoxically it can introduce an intolerable level of mechanical noise. Another solution could be the Install version, sited in a distant cupboard.

Russ Andrews Accessories offers a 60-day money back guarantee on its products, and on that basis it’s easy to recommend a trial to gauge first whether you’re unfortunate enough to encounter hum issues in your neighbourhood. If all is clear, the product should then sell itself. 

Price and contact details

Product prices

  • BMU 3000 Mk II, £4,559
  • BMU 1500 Mk II £3,059
  • BMU 3000 Install £4,150

Manufacturer

Russ Andrews Accessories Ltd

www.russandrews.com

+44(0)1539 797300

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