Apex Equipment Couplers – originally Zenith*

Apex couplers drain RF interference, vibration and induced currents that circulate in the metal casework, all damaging the music signal.

“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.

The Quiescent Apex couplers do a lot more than just passive support and isolation:

•  they drain RF contamination from electronics

•  they drain vibration into internal labyrinths

•  they absorb induced currents that circulate around metal casework

•  they isolate from outside interference

•  they are a major upgrade for an existing rack.

The big problem, not solved by conventional isolating, is that equipment generates its own vibration – you know, microphony? – internally. So traditional isolating actually traps vibration inside the electronics.

Villains are power transformers and loudspeakers that stream vibration throughout the system via the metal connecting cables

Called “couplers” the Apex  components actively couple, mechanically and electrically, to the metal chassis of the electronics.

The Couplers both isolate and act as sinks for vibration, RF Intereference and EMI, draining energy from component casework into their own internal labyrinths where it is dissipated. We strongly advise their use under any source components – turntables, CD players, streamers – and especially the preamp, at the heart of the system. After that look at any power supplies and include microphonic valve equipment.

We’ll gladly lend you sets of Apex to try in your own system. Be sure to place one under the transformer where possible and don’t forget external power supplies.

Naim owners with additional PSUs – you’re in for a treat!

And then there’s RF interference

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

Radio Frequencies enter the system from TV, radio and 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.

RF signals react with, or intermodulate, the music signals to create spurious alternatives and destroy information in the process, information that cannot be recovered by any equipment upgrading.

Borrow some sets from us to prove it to your own satisfaction.


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

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