Quiescent Apex Equipment Couplers

Gain clarity, realism, better bass definition, banish glare

Chosen by hifi+ magazine as ‘Accessory of the year’ December ’21

Quiescent Apex 40mm couplers

Apex Couplers drain vibration and electrical pollution from components

HiFi systems are flooded with vibration and electrical “noise” energy that clashes with the music signal and destroys information.

Place these couplers under key components for gains in realism, presence, imaging, cleaner treble, tighter and deeper bass – greater return than normal equipment upgrades – and permanent foundations.

The two sets of Zenith * couplers have already taken my listening to a new level, exceeding my expectation. The improvement was immediate and obvious, and grows with each listening. Truly amazing !” – a delighted customer with a Naim amplifier and a Yamaha CD player.

Use them throughout your system – under turntables, CD players, streamers, preamps, power supplies and power amps, because they:

•  ground electrical “noise”

•  absorb Radio Frequency Interference

•  drain vibration into internal labyrinths

•  absorb magnetic currents that circulate around metal casework

•  are a major upgrade for an existing rack, especially glass and wood shelves

Systems create their own vibration, from transformers and loudspeakers, and it’s carried throughout by the metal cables. Apex couplers absorb this vibration and drain it away.

BUT if you isolate your equipment from its surroundings you actually trap vibration inside the electronics.

Apex supports absorb RF interference

RFI is a major cause of hard, edgy treble that everybody hates and digital sources are especially vulnerable. This is NOT “digital sound“! – it’s RF contamination.

Radio Frequencies enter the system from TV and radio broadcasts, mobile signals and through the mains, generated by LED and fluorescent lights, wifi distributed via the mains and simple switch mode power supplies.  Your DAC (digital/analogue converter, separate or built-in) cannot distinguish them from the music signal. All are processed together and, similar to vibration damage, key music information is destroyed.

This information cannot be recovered by any equipment upgrading.  Once it’s gone it’s gone.

Apex Couplers under Quiescent Streamer

Quiescent Apex Couplers under the Streamer power supply

Try Quiescent supports before you buy

– we’ll lend you some to try in your own system.

*The Zeniths have been re-named to Apex in line with other products in the Quiescent range, such as the cables.


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"When love and skill work together expect a masterpiece".

John Ruskin (1819 - 1900)