Introducing the AUVA SW – Precision Isolation for Subwoofers

Energy-Absorbing AUVA Pods

At the first point of contact with the subwoofer, each isolator features an AUVA particle impact damping chamber inside an aluminium pod. In the chamber, a tuned mass of particles absorbs and disperses vibration, converting kinetic energy into heat.

CSA Isolation, Tuned for Subs

Directly attached to the AUVA pod is a Custom Silicone Absorber (CSA) insert designed to match the subwoofer’s weight. Building on the proven technology used in our AUVA EQ system isolators, this version uniquely features 8 “prongs”, tuned specifically for the energy profile of subwoofers. Six weight ratings ensure consistent, optimised isolation—whether your sub is compact or heavyweight.

Precision-Guided Compliance

Like the EQ, the AUVA SW uses the CSA element to absorb vibration—but what sets it apart is how that movement is controlled. Each case is machined from solid aluminium into a rigid, braced housing which is carefully shaped to guide the CSA and prevent it from buckling, ensuring it moves exactly as designed. This precision allows us to push the boundaries of compliance, maximising low-frequency isolation without compromising stability.

Together, they deliver exceptional control over structural vibration without sacrificing stability.

Engineered Through Modelling, Refined by Listening

Developed using advanced Finite Element Analysis (FEA) and refined over twenty nine design iterations, the AUVA SW balances scientific precision with extensive listening tests. Every element, from material density to cavity geometry, was tuned to achieve optimal energy dissipation and audible realism.

Different Philosophy: Subwoofers vs. Speakers

While Stack Audio’s AUVA loudspeaker isolators are designed to keep speakers rigid to maintain mid-range and high frequency driver alignment and imaging, the AUVA SW is different. Subwoofer energy is omnidirectional, producing long-wavelength vibrations that travel through structures. The AUVA SW’s tuned compliance targets this specific low-frequency energy, decoupling the subwoofer from the floor while maintaining composure and control.

Flexible Installation

The AUVA SW is designed for effortless integration with virtually any subwoofer. It can be placed directly beneath the cabinet—no threading or modification required. A height-adjustable silicone/metal pad is available for added stability. Alternatively, for subwoofers with removable feet or threaded inserts, optional adapters are available for a secure, threaded fit if preferred. This flexibility ensures the best possible performance regardless of subwoofer design.

AUVA SW Specifications

• Diameter: 50mm

• Height: 35.4mm

• Weight: 120g each

• Available in six CSA weight ratings (per set of 4):

  • CSA 1: 1–16kg

  • CSA 2: 16–24kg

  • CSA 3: 24–32kg

  • CSA 4: 32–40kg

  • CSA 5: 40–48kg

  • CSA 6: 48–56kg

AUVA SW Price and Availability

The AUVA SW is priced at £270 ex. VAT for a set of 4 (for all CSA ratings). It is available to buy now, direct from www.stackaudio.co.uk. Each set is hand-assembled in the UK and tuned for its specified weight range.

Flexible shipping – US and EU fulfilment

All European orders are shipped from within the EU. Location-based VAT is included in the pricing shown on the website.

US orders are now shipped domestically from Stack Audio’s new US fulfilment centre, providing peace of mind from international delays and no import duties or tariffs to pay on delivery. All duties are included in the pricing shown on the website.

Orders outside the EU, UK and US are shown without VAT or regional adjustments.

Every Stack Audio product is backed by a 60-day worldwide money-back guarantee, giving customers complete confidence to experience the improvement in their own system.

More info: www.stackaudio.co.uk/auva-sw