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    Gerrards Cross SL9 0LD
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Your input is important to us. Please provide your valuable feedback. Here are some testimonials from our clients:

Coherent Systems Technical advice and sales

Hello Tony,

A bit late with feedback on the Nova Fidelity but truth is I haven't stopped listening to music. Everything is much more listenable, less edgy, more detailed, and the music just grabs my attention so much more. A great recommendation and great service as always. You've a very happy customer here in the north west. :-)

Paul H. North West

(Ps. And thanks for the albums :-). )
Date of Posting: 05 November 2020
Posted By: Paul Hudson
Hello Anthony,
This is a quick message to say thank you for everything on the recent order.
It arrived no problems at all, and the crocodile clip is now firmly attached to where it needed to be. Thanks very much for your time in swapping the connections on this, it is appreciated.
All in all, great service from beginning to end.
Thanks for your time with this and all the best.

G. Osborne

North East
Date of Posting: 28 October 2020
Posted By: Gary Osborne
Coherent Systems Upgrade services

Mutec MC3+USB, Coherent modified for an external QP Power supply.
The Mutec MC3+ from stock was without doubt the most cost effective upgrade I have made to my digital system. Having Tony modify it for one of Coherent's QP-1 Power supplies just takes everything to the next level. The SQ now has more depth, more detail and a wider sound stage.The Mutec mc3 is on song now, tried taking it out of my system but couldn’t believe I was ever happy listening without it. Stunning. Without it in place the sound becomes restricted and anaemic. Highly recommended.


Date of Posting: 19 October 2020
Posted By: David Allen
Coherent Systems Repair Service Belcanto CD3T

Good evening Tony,
CDT-3 delivered at five to six this evening.
Slotted back into the rack after tea and now spinning some nice tunes!
Many thanks for the very fast turnaround and repair!

Many Thanks

R. Heaney

Date of Posting: 18 October 2020
Posted By: Rodney Heaney
Coherent Systems sales and service

I trust you got your demo Mutec back without issue. The new replacement sounded enjoyable right out of the box, which is so rare for an item of hifi equipment. What a great piece of kit - relatively not too expensive and yet a definite and very big improvement as soon as it's plugged in.

When you recommended I try it I must admit I was a bit skeptical. The Dac manufacturer keeps writing how they've got their usb to be as good as any input, and I'd worked on improving my usb input quite a bit with endless magical boxes. But with the offer of a demo I thought I had nothing to lose and I'm so glad I did try it as it's such a large improvement and resulted in some very enjoyable evenings of listening. All the advice you have provided me has resulted in some very worthwhile improvements in my system. Thank you.

Paul H

North West September 2020
Date of Posting: 28 September 2020
Posted By: Paul Hudson
Coherent Systems upgrades and audio consultancy

I had discussed with Tony further areas for improvement, and he had proposed to upgrade selected components in my Audiolab M-Dac. However this proved non-viable, and since the Audiolab could no longer be returned in working order, Tony graciously offered to replace it gratis with an ex-demo Bel Canto model, which now has proved a big step forward with addition of improved power supply...many thanks Tony!
Further areas of improvement are further Black Ravioli pads for various components, giving better definition and detail. I was able to trial these without pressure to purchase, but once trialed, they don't go back!
I felt that the clarity from my Quadral Chromium 8 speakers was affected by the loose-lay engineered wood flooring in my listening room. Tony suggested the use of out-rigger feet designed for these speakers. Now installed, the sound-stage has definitely improved.
Its so helpful to get expert advice and thoughts without any pressure to buy. I am looking forward to further areas for gradual improvement.

M Trevers

Date of Posting: 03 August 2020
Posted By: Martin Trevers
Coherent Systems repair service

Wadia 121 DAC repair
I sent my broken DAC to Anthony at Coherent Systems for Investigation / repair. It was very reassuring to talk to Anthony who was very knowledgable and filled me with confidence that it could be repaired successfully. I was updated regularly both with progress made and any possible costs. I have now received my DAC back in full working order.
Great job thank you


Date of Posting: 07 July 2020
Posted By: Nigel lester
Coherent Systems QP-1 power supply and service

My Coherent QP-1 super-cap power supply was originally bought for powering a 5V Pi and 12V DAC. It was then re-purposed for twin 5V to power an Asus Tinker Board S and Mutec MC-3+ USB. Recently I had it upgraded again to Tony’s latest specification, providing extraordinarily low noise performance and high current demand capability. The Asus streamer guzzles over 2A while booting up, settling down to 0.9A when playing music. The QP-1 handles it, and the Mutec reclocker, with ease while providing a very low output impedance and noise specification.

The QP-1 brings clarity, nuance, dynamic clout, bass heft and scale to my system. It has remained totally reliable while performing its job of feeding my components with ultra clean DC power.

M Taylor

Date of Posting: 27 June 2020
Posted By: Martin Taylor
Coherent Sales and Service

Having been introduced to Tony in January 2020 by a fellow audiophile to discuss the addition of a Mutec Ref10 external clock for my DCS Vivaldi set-up, I was immediately impressed by not only his knowledge of the hifi world but also the technical understanding of how products are made.

During the next couple of weeks we organised a session where Tony would come over to me and bring with a Mutec Ref10 so I could try in my system. He had assured me the difference would be significant and that is what was heard. I duly placed the order, or so I thought!

I was then made aware of a superior product which was not released and that it would be possible to obtain this, although there would be a delay since it wasn’t due to be available until April. Tony was honest and upfront, whereas others may have tried to do the quick sell. I agreed to wait until this was available and placed the order.

Tony was very kind and allowed me to borrow his unit (and clock cable) until mine was available. Considering this was a matter of months and not days or even weeks, I was very grateful (again exemplary service!). My unit actually arrived slightly early and was installed by Tony.

I would highly recommend Tony and the services / products he offers. There is no pushy sales person, just a very interesting and engaging person to talk all things hifi with.


South East
Date of Posting: 26 March 2020
Posted By: Marc Kellinger
In August 2019 I went to see Tony at Coherent Systems with my long term Oracle turntable. Having owned the turntable from new, it was now time to bring the deck into the 21st century. It was cosmetically, mechanically and electronically in a real mess.
After leaving the TT with Coherent Systems for a few weeks I received a call from Tony to say the Oracle was ready for collection. I was presented with a perfect turntable in every respect .Tony had sent it to Canada to have a new drive motor and electronics to be installed and upon its return and rebuilt it for me.
Tony also suggested a cartridge which is superb and saved me a few grand over the cartridge I was going to buy. Tony set up the whole deck, arm and cartridge to perfection. Tony has a huge knowledge of all types of hi-fi gear and music also. He spent a lot of time explaining my options and even sent me pictures of my deck being built and set up.
Really enjoyed meeting him and dealing with him and he would be the first person I would talk to about future upgrades. Andy Mcfarlane

Andrew McFarlane

Date of Posting: 23 March 2020
Posted By: Andy Mcfarlane

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