Stack Audio AUVA SW – Precision Isolation for Subwoofers

Stack Audio has added the AUVA SW to its range of isolators, offering a purpose-built design to manage the low-frequency energy produced by subwoofers.

The UK-based brand states that by preventing vibration from transferring to floors and equipment, the AUVA SW keeps bass tight, controlled, and focused, preserving the clarity and composure of the entire system. Furthermore, by removing structural vibration that can smear fine detail, it also helps maintain spatial cues and midrange coherence, contributing to a stable, natural soundstage.

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.

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.

Directly attached to the AUVA pod is a Custom Silicone Absorber (CSA) insert designed to match the subwoofer's weight. Building on the company's proven AUVA EQ system isolators, this version features eight prongs, specifically tuned to the energy profile of subwoofers. Six weight ratings ensure consistent, optimised isolation—whether your sub is compact or heavyweight.

The AUVA SW uses the CSA element to absorb vibration—but it's how it controls that movement which is special. 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.

Apparently refined over twenty-nine design iterations, Stack Audio says that "the AUVA SW balances scientific precision with extensive listening tests," adding that "every element, from material density to cavity geometry, was tuned to achieve optimal energy dissipation and audible realism."

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.

The AUVA SW comes in sets of four priced at £270 (ex. VAT) and is available in six CSA weight ratings, from CSA 1 for subs weighing 1-16kg to CSA 6 for 48-56kg subwoofers.

For more information visit Stack Audio