Hegel Music Systems H590 integrated amplifier
- Alan Sircom
- Nov 2018
Here is the big one: Hegel’s top of the tree. The H590 from Hegel Music Systems is not only the biggest integrated amplifier the company has ever produced, but it’s also the most connected, the most forward-thinking, and – in outright performance terms – probably its best yet. Granted there are a couple of pre/power combinations in the line-up that might have something to say about that (especially the 1,100W H30 mono brutes), but I’m holding to that statement.
The H590 is the synthesis of the best of the latest line of integrated amplifiers (such as the innate flexibility of the Hegel Röst and later designs), coupled with the most up-to-date versions of all the amplifier technologies Hegel has incorporated into its amplifiers for the longest time. Now mix in the kind of ‘best in show’ components and technology so new it gets its first outing here and you have an unbeatable combination.
The Hegel H590 adds more power to the likes of the Röst, H90, and H190, and it brings more power and connectivity to the H360. With its strangely precise 301W per channel, you could be mistaken for thinking the H590 occupies the top slot of Hegel’s integrated amp line-up simply by virtue of power delivery. If you need a bigger amplifier and the H360 won’t cut it, then the H590 is all you need. While true on the surface, this is too simplistic a reading of the situation. Interestingly, the price of the HD30 flagship DAC from the company and the H360 is not that dissimilar to the full-up H590, and until this model shipped, this was probably the best Hegel set-up you could buy. The H590 effectively obsoletes that combination, as you won’t buy both when the H590 performs this well.
Like the other integrated models in Hegel’s line-up, the H590 features an extensive onboard digital audio section and analogue inputs. Unlike those other integrated models, however, the H590 does not place limits on either in order to fit on the back panel. So, you get a trio of stereo RCA line inputs, and two sets of XLR balanced line inputs (as well as fixed and variable RCA stereo outputs) on the analogue side, and two coaxial (one of which uses BNC), three optical, USB, and Ethernet digital inputs, and even a BNC coaxial output.
That is an exceptionally comprehensive line-up for an integrated amplifier, reflecting the does-it-all nature of the Hegel H590. There are a couple of obvious omissions, however; no phono stage and no headphone socket. The first is perhaps more understandable than the latter, as Hegel has long eschewed turntable as one of its regular sources, preferring instead to allow the end user to specify their own analogue front-end. While those seeking an all-Hegel electronics solution that includes turntable replay might want a standalone phono stage from the brand, the onboard equaliser in an amplifier is now a rarity.
The absence of a headphone socket is more odd, as Hegel makes an extremely good headphone amplifier circuit in its own right on all the other integrated models in the line-up. Hegel is extremely adept at reading the demands of its customers, however, and I suspect the absence of a headphone amplifier is no accident.
Hegel’s design criteria is reduced to a series of pithy names that aptly describe aspects of the technology, including the localised feed-forward amplifier circuit called SoundEngine, DualAmp (which separates out the voltage and current gain stages) and the related DualPower (which provides specific power supply feeds for those separated parts of the amplifier circuit), and finally OrganicSound that requires careful voicing of the amplifier against a known reference of acoustic instruments and vocalists not known for their love of AutoTune. There are a similar group of names for the digital audio side of things, including SynchroDAC (synchronised – as opposed to asynchronous – upsampling) that goes with the company’s LineDriver technology (high-frequency filtration), a similarly synchronous USB technology, all controlled by pico-second accurate MasterClock. All of the technologies underlying these names have been improved in the process of developing the H590, and you can hear this.
Stepping out of HegelWorld for the moment, the nuts and bolts of the H590 are extremely impressive. That power amplifier stage delivers its 301Watts in Class AB, but it’s a high-bias Class AB making it run in Class A for longer. The power amp’s output is achieved by using 12 output devices per channel, and a huge power supply transformer (which accounts for the height of the amp). On the digital side, this is the first domestic product in the audio world to sport the latest AKM chipset and this meant a lot of coding performed by Hegel’s team itself. The benefit of this is it brings the second-generation of MQA processing to the table, alongside PCM to 32-bit /384kHz and DSD 256 (on USB).
The coding part is really clever because it allows the user to very simply utilise Tidal’s services and leverage MQA extremely easily. It allows true second-generation MQA unfold internally, which means you tell Tidal (via your phone or tablet) to send an authenticated MQA file directly from a router to full decode inside the H590, with no intermediary unpacks or handshakes. Making Hegel’s H590 the Steve Austin/Six Million Dollar Man version of MQA decoding: better, stronger, faster (although without the Bionic Eye and Power Arm).
Setting up the digital side is extremely easy now. The amp has its own Network Configuration page and if connected to a wired router, press and hold a button a couple of times and up pops the name and IP address of the H590. Type that into a browser on a computer and you can update the firmware, reassign the name and IP address for a more complex multiroom system, or play dating agency between the H590 (acting as media renderer) and a UPnP/DNLA compatible media player. Similarly, it’s easy to hook the H590 to AirPlay or Spotify Connect by adding an Ethernet cable to the appropriate wireless router. Both AirPlay and Spotify ‘see’ the H590 as a compatible/available device, and you simply connect your iDevice or similar to the H590 and away you play. This is one of those installation concerns that is more complex to describe in detail than it is to do in reality (rather like making toast – imagine describing the process in minute detail and it appears mindbendingly difficult).
I have a bit of a problem with ‘flagships’. Sometimes, they have an alarming habit of going for the impressive so much that they undermine what was so good about the more attainably-priced models. It’s a belt-and-braces approach that makes for a bigger amplifier, but not necessarily a better one. It’s a problem in reverse, too; the company that started out at the top of Mount Olympus often fails to make the less expensive models live up to expectation. So, there was a bit of a concern that Hegel might go a bit ‘flashy’ in making The Big One.
I needn’t have worried. Given its northerly latitude (shared with Disenchantment Bay in Alaska), it’s probably not that difficult to retain a cool head in Oslo, and cooler intellects than mine made the H590 retain the advantages of the smaller Hegels, with just the right amount of extra heft and all-important resolution to more than justify its position at the head of the family. Just give it an hour to warm through.
There are a few electronics companies that gain a lot of support and followers among loudspeaker designers because these brand’s amplifiers ‘do no wrong’; in other words, they make a great neutral platform for the loudspeaker designer to weave their own product, and a perfect demonstration product for the company to showcase their new loudspeakers, knowing the amplifier will handle everything thrown at it. These are ‘…just add loudspeakers!’ designs that dealers love, too. Hegel is one such company and the H590 extends that ‘…just add loudspeakers!’ ethos to some very demanding partners and spaces. From the perspective of an audio reviewer, there is nothing better than an amplifier that I know will satisfy the majority of prospective buyers regardless of their tastes in music, the loudspeakers they currently use, or the loudspeakers they might intend to buy next time around. And, while Hegel gets demonstrated a lot of the time with Nordost cable and KEF, you could partner the H590 with practically everything and it would make friends and make everything talk to everything else. It’s like the Rosetta Stone of amplifiers.
That makes describing the H590’s sonic performance easy. It gives the music and the loudspeakers what they want. And it does it better than many by doing less, rather than more. The old canard of ‘sins of commission and omission’ is apt here. In all its designs, Hegel doesn’t ‘do’ commission: if you are looking for an amplifier that pretties up the sound of your music, or adds a bit of thickening bottom end to fill in the gaps in your loudspeaker, look elsewhere, The Hegel’s sing honest and true. But, the smaller models do some small amount of omission if you are looking for a big amp to drive a big speaker. Yes, they punch above their weight (the inherent honesty of the design makes the H90 a surprisingly great partner for the Wilson Duette Series 2) but there is still a limit to this, and that’s where the H590 comes in. It doesn’t do ‘limits’ either.
The H590 doesn’t sound obviously or overtly powerful… until you need those power reserves. Then they are subtly introduced. Nothing showy or flashy, you just realise that the amplifier is doing all you want from an amplifier and driving a pair of loudspeakers absolutely correctly. You then flip between musical genres, taking in everything from fey girl with guitar sounds (I went with the now somewhat rusty sounding ‘Mushaboom’ by Feist from her Let It Diealbum on Interscope records, and her diction and articulation was nigh on perfect, and the handclappy percussion was deftly separated) right up to full-thickness orchestral works [Mahler’s Eighth Symphony, Solti and the Chicago SO, Decca] and at no time did the H590 give away its size, its limits, or did it ever give up gripping those loudspeakers. Basically, unless you are using the Apogee Divas from the 1980s, there isn’t a loudspeaker in Christendom that the H590 can’t drive.
It’s not just about brute force. The amplifier has subtlety, dynamic range, texture, resolution, rhythm, and outstanding soundstaging properties. None of which are drawn to your attention; you just like the sound. If there is a character to Hegel’s sound – common to the breed – it’s a very slight forwardness that gives a little bit of a zing to the upper-mids. This is not an excessively bright and over-energetic sound, but just a tiny bit of pep in the Hegel’s step.
The DAC is a resolution monster. There is more detail on offer here than many good standalone DACs. In fact, it’s good enough to make you wonder whether the company’s own HD30 is worth the investment! I’m MQA-agnostic (when it sounds good, it sounds great… other great-sounding formats are available) but I couldn’t help but be enthralled by the sound of the best in MQA. There is ‘some’ inverted snobbery in the audio industry, but the MQA version of Beyoncé’s ‘Sandcastles’ and the intro to ‘Daddy Lessons’ [both from Lemonade, Columbia] are outstanding pieces of work. The combination of effortless ease and the excellent sound make the H590 something of an MQA ambassador.
All up, the Hegel H590 ultimately asks some difficult questions of the audio amp world. This is the ‘straight wire with gain’ for the high-end world. More (in most cases) buys you a shinier case, a greater number of boxes and some extra hoops to jump through. Unless you need that kilowatt power amplifier to drive your difficult loudspeakers to PA levels, the Hegel H590 might just be all you will ever need.
Type: Integrated amplifier with network connected DAC
Power output: 2 ×301 W into 8 Ohms
Minimum load: 2 Ohms
Analogue inputs: 2 ×balanced (XLR), 3 ×unbalanced (RCA)
Digital inputs: 1x BNC 75Ω S/PDIF, 2 ×coaxial S/PDIF, 3×optical S/PDIF, 1 × USB, 1 ×RJ45 Ethernet
Line level output: 2 ×unbalanced variable (RCA)
Diigital outputs: 1x BNC 75Ω S/PDIF
Frequency response: 5 Hz–100 kHz
Signal-to-noise ratio: More than 100 dB
Crosstalk: Less than -100 dB
Distortion: Less than 0.01% @ 50 W 8 Ohms 1kHz
Intermodulation: Less than 0.01% (19 kHz + 20 kHz)
Damping factor: More than 4000 (main power output stage)
Dimensions (H×W×D): 17.1 ×43cm ×44.5cm
Manufactured by: Hegel Music Systems
Tel: +44(0)7917 685759
Read Next From ReviewSee all
Review: Melco S10 data switch
Jason Kennedy reviews the noise-busting Melco S10 data switch
- Hi-Fi+ Staff
- Mar 2023
dCS APEX digital converter upgrades
The Ring DAC is core to dCS's exemplary digital performance and has remained at the pinnacle of converter design for the last 30 years. But the new APEX upgrade raises its performance still further, according to Chris Thomas.
- Chris Thomas
- Mar 2023
Shunyata Research Everest 8000
Alan Sircom discovers the joys of isolation (at least between components in a good audio system) thanks to the Shunyata Research Everest 8000 power distributor.
- Alan Sircom
- Mar 2023
Revival Audio Atalante 3: Dynamic, crisp, detailed
hi-fi+ Editor Alan Sircom reviews the Revival Audio Atalante 3.
- Hi-Fi+ Staff
- Mar 2023