Removing the vibrations, revealing the music

Technology Overview

Vibrations create music. Pressure deviations cause particles in the air to vibrate, cascading with each other until the sound wave reaches our ears, which our brains process as music. The precise delivery of these vibrations is essential for the true enjoyment of music.

Along with the sound waves coming from our loudspeakers, other sources of vibration surround our systems and listening rooms. Those vibrations can and do mask and distort the music we love. Our company mission is to remove the unwanted vibrations, leaving only the pure and precise musical vibrations that the artists we love wanted us to hear.

Removing vibrations is a multi-faceted engineering challenge. The goal is to remove multiple vibration frequencies and avoid pushing vibration into different frequency ranges, which alter the music. Removing vibration reveals more texture improving timing and spatial location. Listening becomes easier, keeping your attention on the music and stopping your mind wandering.

Stack Audio’s understanding of vibration control has led us to focus on three areas of technology and engineering expertise in the pursuit of enhancing the musical performance of hi-fi systems and bringing music to life.  We use technologies that enable the fast dissipation of vibrations a more effective way than simply using mass to absorb and slowly release them. Manufacturing precision, rigidity, shape is key to ensuring these technologies perform to the highest level.

AUVA

Particle Impact Dampening

AUVA is our patent pending technology that integrates a phenomenon called particle impact damping. This quickly transforms vibration energy into heat through friction and collision between particles, dissipating energy quickly and efficiently.

AVDC

Vibration Dissipation Compound

AVDC stands for Advanced Vibration Dissipation Compound and is a form of energy dissipation. This converts micro vibrations that colour and mask musical signal into heat near-instantly, avoiding the smearing effects of over-damping.

PRS

Precision, Rigidity and Shape

Precision, rigidity and shape are absolutely integral in our product design and manufacture. Vibration takes the path of least resistance, and the shape and rigidity of components directly influence the flow of vibration.

AUVA

Particle Impact Dampening 

AUVA

AUVA is a patent pending technology that utilizes a phenomenon called particle impact dampening to effectively reduce audio vibrations and enhance sound quality. It is integrated into our loud speaker isolators and SERENE baseboards. The technology absorbs vibration energy and converts it into heat, through friction and collisions between particles.

To visualise this process, imagine a ball thrown onto a hard surface and one thrown into a sandpit. The ball thrown at the hard surface bounces repeatedly only coming to rest when all the kinetic energy from the throw (and gravity) has been dissipated. The ball thrown into the sandpit stays where it has landed as the grains of sand dissipate the energy quickly and efficiently with no aftershocks.

Designing vibration absorbers that work in an audio system requires them to be effective on vibrations from multiple directions and over a wide range of frequencies. The AUVA isolators uses a multi-chambered, tuned vibration absorbers that use materials like tungsten to absorb the broadest range of frequencies. transmitted and dissipated efficiently. The carefully designed precision-machined body vibrates passing the energy through to the particles which are excited and collide absorbing the vibrations.

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AVDC

Vibration Dissipation Compound

AVDC

AVDC consists of a thin visco-elastic membrane which is sandwiched between metal layers. It isn’t cushioning and does not move or compress. It is not a structural element by itself, but the way it is applied fully maintains the rigidity of the components it is fixed to. It is incorporated into the machined hexagonal cells used in many of our products.

AVDC converts micro vibrations that colour and mask the music signal into low-level heat near-instantly, avoiding the smearing effects of over-damping. Poorly applied damping can make the listening experience worse, ruining timing and losing musicality. Vibration that is over-damped (in effect, stored) is not dissipated but released slowly, creating echoes and smearing in the following moments. Instead AVDC works to reveal subtle details that otherwise can be hidden and obscured without harming the timing or rhythm of the music.

AVDC is not used in support/high load areas. Instead, it is used on turntable structure and platform components and inside electronics cases.

PRS

Precision, Rigidity and Shape

Precision, rigidity and shape

Vibration takes the path of least resistance, and the shape, rigidity and the precision of the sum of parts directly influences the flow of vibration. Carefully designed structures allow vibration to flow quickly through to the vibration absorbing technology (AUVA or AVDC) dissipating the vibration near instantaneously and avoiding the detrimental smearing of sound from vibration echoes without effecting the rigidity of the shape.
For all Stack Audio products, choosing the right materials and shape at the design stage is fundamental. An example of this is or carefully designed honeycomb structure in our SERENE range of LP12 upgrades uses one of the strongest and most rigid shapes found in nature – hexagonal cells. It maintains the structural integrity and is an extremely efficient way of transmitting vibration through to the AVDC for effective dissipation. The machined aluminium cases of the AUVA isolators are designed to provide the most efficient flow of vibration through to each of the multiple particle-dampening chambers whilst still maintaining the structural integrity of speakers. Precision and critical tight tolerances in the manufacturing stage is essential to ensure all products work as intended and maintain their performance over a lifetime.

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