Critic Reviews

HighFidelity Magazine review the AUVA EQs
Highfidelity Magazine reviewed our AUVA EQs, experimenting with them under several pieces of Hi-Fi & the beautiful Rega Planar 3 50th Anniversary turntable.
René Van Es of reviews the AUVA EQs.
"The bad thing is that I will have to say goodbye to the CSA 1 and CSA 2 from Stack Audio. They work as promised and do so in an excellent manner. The price for a set is not prohibitive nor excessive compared to cheaper or more expensive competitor alternatives."
Jason Kennedy reviews the AUVA EQs
"If you want to get a better idea of what the components in your system are capable of, I suggest you give these a try"
Hans Beekhuyzen reviews the AUVA EQs
"I review many good products, but there is occasionally a product that blows me away, this is such a product."
Paul Rigby (The Audiophile Man) recently awarded the AUVA EQs a 9/10.
"Without the feet, the stereo image wandered all over the place. With the feet, the stereo image was fixed, locked straight ahead."

Removing vibrations

The AUVA EQ is an equipment isolator that combines two distinct vibration absorbing techniques working in tandem for the ultimate in isolation performance.

Hi-Fi equipment can suffer from vibrations known as microphony. This is when physical vibrations generate electrical signals inside sensitive components, causing audio interference. These vibrations can originate externally, from sources like speakers of traffic, and internally from components like transformers and spinning disc drives.

Removing the vibrations reveals more detail and texture in music, which is why Stack Audio has developed the AUVA EQ system to allow your Hi-Fi system to perform at its best.

How it works

AUVA EQ uses a hybrid vibration absorption system combining two technologies – AUVA and CSA. AUVA is our Particle Impact Damping technology developed for our award-winning loudspeaker isolators. CSA stands for Custom Silicone Absorber – a new purpose-designed deformable suspension that provides Compliant Damping.

The rigid machined aluminium shell of the AUVA EQ is designed to sit underneath Hi-Fi equipment in direct contact with the case. The Custom Silicone Absorber sits on the Hi-Fi shelf or rack. As such, the case of the Hi-Fi equipment is directly coupled with the AUVA chamber of the EQ but de-coupled (or isolated) from the Hi-Fi shelf via the CSA suspension. This construction allows the AUVA EQs to help absorb internal vibrations whilst isolating the equipment.

AUVA Technology

AUVA harnesses the power of Particle Impact Dampening which eliminates vibrations across a broad frequency range, unveiling remarkable clarity in musical recording. The vibrations excite the particles, creating movement and collisions that dissipate the energy virtually instantaneously. Think of it like throwing a ball into soft sand -the sand absorbs the energy from the ball, preventing it bouncing. CLICK HERE to read more about AUVA technology.

The AUVA chamber, strategically positioned at the first point of contact between the isolator and Hi-Fi casing, helps absorb internally generated vibrations from the equipment, preventing them affecting sensitive electronics within the unit.

Custom Silicone Absorber

Unlike loudspeakers that should be positioned precisely and held rigidly, Hi-Fi electronics benefit from being de-coupled from the stand or shelf that they are setting on. By their nature, compliant solutions absorb vibration by movement.

Our Custom Silicone Absorber is specifically formulated and modeled to absorb high levels of external vibration that can be transmitted up through Hi-Fi racks, effectively de-coupling the Hi-Fi equipment. The CSA is height adjustable and comes in 3 versions to work optimally with different weights of partnering equipment.


The EQs are designed to sit flush between Hi-Fi electronics and the equipment shelf or rack and are suitable for Hi-Fi sources, digital processors, and amplifiers. They can be used under rigid turntables, but we do not recommend using them with suspended turntable designs.

AUVA EQs come in sets of 3 or 4. CSA inserts are available in 3 versions to suit different equipment weights. EQs are individually height adjustable up to 3mm.

Size: (D)50(H)28mm

CSA 1: 0-4kg, (0-9lbs) per isolator*

CSA 2: 4-10kg, (9-22lbs) per isolator*

CSA 3: 10-15kg (22-33lbs) per isolator*

*All weights are per isolator, divide the weight of your HiFi by the number of isolators you will be using to ascertain which CSA insert you will require. 

All AUVA products are covered by a 30-day moneyback guarantee.

£198.00 for 4 isolators

Customer Reviews

Art S. – USA
"The EQ's have arrived and somehow make the Mola sound a bit more relaxed and open!"
Andy N. – UK
"So the new set landed under the pre amp. Primaluna evo400, and i can only say wow! That's a huge difference. Didn't expect something like that. Everything became very natural and organic with better dynamics, way dipper. "
Ivica S. – Croatia
"Now a little about the sound - a better definition of the entire sound spectrum, a more adjusted bass that is bennefitted vocals as well as the rest of the sound spectrum. The sound has been changed, I would say that it is now globally finer."
Alun R. – UK
"Sheer slam and attack on the drums is improved Bass has become deeper with more control and drive/slam Vocals are more prominent Soundstage improved across the board. My system has never sounded quite so good"
David A. – UK
"The AUVAs are a revelation under my Musical Fidelity M6SCD Cd player, once you put them under equipment you do not want to remove them."
Kevin B. – UK
"Pleased to say the EQs were delivered last week and they have since been installed and doing a great job. Size-wise and finish-wise, they are a perfect match. They have also rectified the vibration issue so I am more than happy."
Klaus B. – Germany
"Using the EQs with the Oppo and TT resulted in improvements which were clearly audible and essential. It sounded as if the musicians were present in the room!"
Martin M. – USA
"I would, at once, recommend the AUVAs to anyone who is a critical listener. They will be well worth the investment."
Ted S. – USA
"All the descriptors that Hans Beekhuyzen used are there. But what I personally found different was a relaxing of my brain. I was listening to the music instead of analyzing the music."
Havard D. – Norway
"Immediately I noticed more separation, or focus, as Chesky Records say. Individual instruments were easier to hear, but also background vocalists."
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