Stack audio about crop


Stack Audio started in 2013 when Theo Stack began the development of an audiophile music streamer, the ONSET. Theo is a self-taught mechanical engineer with a deep passion for music. Based in Bovey Tracey, Devon, Stack Audio is an audio company that designs, develops and manufactures its products here in the UK.

The Stack Audio promise

Here at Stack Audio our main focus is removing the parasitic vibrations that have been plaguing HiFi systems since their inception. Our aim is to endeavour to explore all avenues of vibration dissipation in the pursuit of obtaining the perfect level of audio playback from your LP12. We are constantly expanding our knowledge in the vibration field and are using everything we learn along the way to refine our products in order to elevate your deck to new highs.


From the outset, a focus on the source has been the foundation for everything Stack Audio does.

In audio terms, focus on the source is about producing the purest musical signal free from interference at the start of replay. DACs, phono stages, amplifiers, speakers and headphones all sound better fed with a clean signal. Focusing on the source removes the need for excessive filtering ensuring no noise cascades down the system. It also means ensuring acoustic energy is not fed back into the system and electrical circuits, so that you hear the music signal just as the producers intended.

We believe high-end hi-fi doesn’t have to come with high prices. Stack Audio products are designed to work well in all systems.


2013-17: Digital - ONSET

The ONSET was an early high-end network streamer designed to work with external DACs. Ahead of its time, the ONSET laid the foundation for ‘Focus on the Source’, with an uncompromising approach to producing a simple, clean digital signal. The ONSET utilised a high-quality linear power supply, kept separate from the sensitive digital circuits. This has had a profound influence on subsequent Stack Audio products.

2018: Analogue - SERENE

Applying the principles of a pure, clean source to analogue replay we focused on the record turntable. Stack Audio focused its efforts on a series of upgrades for one the longest lasting and most loved of all British record players, the LP12. Our SERENE upgrades are influenced by passionate enthusiasts who love the sound of their LP12s, providing them with the opportunity to add precision, rigidity and detail better suited to modern and revealing hi-fi systems.

2021: Expansion - SERENE II

The SERENE upgrades have gone through continuous development, always focused on the goal of dissipating vibration and ensuring the signal generated by the cartridge is as clean and pure as possible to be fed to the phono-stage. We are now on our second iteration of the SERENE range. This comprises of the Tenor, Alto, and the upper echelon of Stack upgrades; the Soprano. The Soprano uses a combination of advanced hexagon cell technology combined with AVDC to produce the best audio playback from your deck. 

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2019: LINK

The follow up to the ONSET, the LINK was embodied the same machined from solid design in a smaller and form. For the digital circuitry and internal power supply, Stack Audio partnered with renown audio engineer John Westlake. John’s approach to preventing jitter and digital noise fitted perfectly with focus on the source.

2021: Refinement - LINK II

Never one to rest on laurels, John Westlake has refined the design of the LINK with an improved clock. Taking the approach further Stack Audio now sells the LINK II with its own external linear power supply, the VOLT.

2021: Power - VOLT

Everything starts with power. Having designed an external linear power supply for the LINK, Stack Audio is expanding the range to offer linear power supplies for other source components. The VOLT’s internal design is by Phil Balaam of Nytech Audio who has worked closely with Stack Audio and utilises high quality audio grade components all housed in an aluminium case.

High current VOLT case & internals

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