In the same way as every musical performance needs a stage so a HiFi needs a stage to bring the music to life in your home. In 1995 we set out to develop a modular rack – the Q4 – that could support a variety of Hi Fi systems and deliver acoustic performance with style. This was achieved by combining solid aluminium columns with specially engineered shelves to create a light and rigid construction to deliver a clearer, cleaner musical performance.

It is commonly accepted that every component in a HiFi system from amplifier to source including record decks, cd players and streamers are microphonic and produce resonance that will distort the quality of the music reproduced by a HiFi system. This distortion can be significantly reduced by siting the HiFi system on a purpose built equipment rack designed to deal with the resonance. The design of a HiFi rack and the use of materials in its construction is critical. To develop our HiFi racks we use the tried and tested technique of tuning by ear in the same way as the finest musical instruments are developed. From extensive research we found that the use of non-ferrous metals such as Aluminium and Bronze along with natural materials such as Wood and Bamboo reduce resonance. Furthermore the shape of the shelves and columns used within the rack will determine how resonance is treated. In particular we found that a light but rigid construction delivers a clearer, cleaner musical performance.

Our first HiFi rack – the Q4 – was launched in 1995 and is still one of our most popular HiFi racks throughout the world. Since its launch we have sought to further improve performance most notably with the introduction of engineered channels in the reverse side of the shelves. This evolution led to renaming the HiFi rack “Q4EVO”. Now to celebrate 20th anniversary we have launched the Bronze upgrade that can be easily retro fitted to any Q4 HiFi rack or wall bracket. Bronze has a broader tonal spectrum and greater sustain that opens the soundstage of your system making it more musical and enjoyable without losing detail. More

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Made in Britain Since 1995
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Q4 EVO Shelf
All our Q4 EVO shelves are specially engineered to reduce mass and resonance to deliver a clearer, cleaner musical performance.
Q4 EVO Shelf Specifications
If the standard dimensions of the Q4EVO do not fit your components then ask us to make a custom version to your specification or use one of our existing custom designs shown below Q4L, QAVM or QAVX.
Custom Made Q4L Specifications
Custom Made QAVM Specifications
Custom Made QAVX Specifications
Bamboo HiFi Rack Shelf FinishBAMBOO
HiFi Rack Shelf Finish
Black HiFi Rack Shelf FinishBLACK
HiFi Rack Shelf Finish
Cherry HiFi Rack Shelf FinishCHERRY
HiFi Rack Shelf Finish
Oak HiFi Rack Shelf FinishOAK
HiFi Rack Shelf Finish
Wenger HiFi Rack Shelf FinishWENGER
HiFi Rack Shelf Finish
Q4 EVO shelves are available in Solid Bamboo or Natural wood finish.
The natural wood veneered shelves are are available in the following finishes:- Cherry, Oak, Wenger and Black as shown. The Solid Bamboo shelves as shown. For more information about sustainability of our bamboo, please click here. Clear and sand blasted glass are available as a special finish. Real wood veneers and bamboo are beautiful natural products and therefore subject to varying grain and colour.
The Q4 EVO Columns come in Black and Silver finish and are available in two diameters, 19mm or SV32mm, and in 6 different heights to accommodate different sized components and can easily be interchanged if your system changes. Spike feet and flat feet are included as standard with your rack, castors are available as an optional extra.
Q4 EVO SV32 Spiked Foot
Q4 EVO SV32 Flat Foot
Q4 EVO SV32 Caster
SV32 Spike | SV32 Flat Foot | SV32 Castor
Q4 EVO 19mm Spiked Foot
Q4 EVO 19mm Flat Foot
Q4 EVO 19mm Caster
19mm Spike | 19mm Flat Foot | 19mm Castor
Column heights available include:
100mm (4") 140mm (5 ½") 180mm (7") 216mm (8 ½") 256mm (10") 326mm (12 ¾")
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Q4 EVO Accessories - Bronze Upgrade20TH ANNIVERSARY
Q4 EVO Accessories - QX7 Floor ProtectorsQX7 FLOOR
Q4 Wall Bracket BambooQ4 EVO
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Click below to view the answers to some of most common questions for the Q4 EVO HiFi Racks.
If you cannot find the answer to your question please
contact us and we will be happy to help.

All of the racks will support a minimum of 80kg per shelf, nearly all large power amplifiers or heavy turntables can be supported.

Theoretically there is no limit, we have found that not exceeding 8 tiers is the maximum recommended for the whole frame in terms of performance and aesthetics.

None of the current range has changed so any of it can be added to. The original Q4 from 1995 is the same today, shelf size and thread size. As systems expand the rack is modular so there should be no problems to add extra equipment like a power supply or DAC.

As the veneers on the shelves are natural there will be differences over time, some woods change more than others so matching them can sometimes be rather difficult. In extreme cases we can try and match to a sample picture of the original.

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Using our product builder you can choose from our range of models, sizes, shelving options and finishes to design your perfect Quadraspire rack.

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For over 25 years we have been enhancing the audio quality of our customers' Hi Fi systems worldwide. Established by Dutch designer Eddie Spruit in an East London studio in 1995, we have successfully expanded and now have a manufacturing facility south of Bath. This is where all of our design development and craftsmanship take place. To ensure quality sound performance we use the tried and tested technique of tuning by ear in the same way as the finest musical instruments are developed.
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+44 (0)1761 452178
Unit 2 Hallatrow Business Park, Wells Road, Hallatrow BS39 6EX, England
Quadraspire - Performance HiFi Racks
Made in Britain
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