Stack Auva SW subwoofer isolators
Stack Audio introduces the Auva SW, a purpose-built isolator designed to manage the powerful low- frequency energy produced by subwoofers. By preventing vibration from transferring into floors and equipment, the Auva SW keeps bass tight, controlled, and focused – preserving the clarity and composure of the entire system. By removing the structural vibration that normally smears fine detail, it also helps maintain the spatial clues and midrange coherence that contribute to a stable, natural soundstage.
A well-integrated subwoofer adds scale and depth to music, but without proper isolation, low- frequency energy can travel through floors and furniture, blurring detail and masking subtle nuances. The Auva SW stops those vibrations at the source, ensuring the subwoofer works in harmony with your system. The result is a cleaner, more cohesive sound where every element shines.
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.
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.
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.
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 £324 for a set of 4 (for all CSA ratings). 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.