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

Coherent service and sales

From high recommendation, contact was made with Tony to undertake a full service on my Oracle Delphi Mk2 with Mk3 towers and 110v turbo power supply. Tony picked up the equipment and carried out a full and professional service bringing back the turntable to its formal glory and sounding very musical.

The service also included fitting a SME 3009 S2 arm, new Hanna SL MC cartridge and also modified the power supply to 230v.

Based on the excellent service provided, Tony again visited to listen and provide comment on the system components working together under no obligation. From interchanging components in a logical sequence, it became evident that the weak link in the system was the amplification (valve amplifier), which was not doing justice to the Sonus Faber Cremona Auditors. Changing the valve amplifier to a transistorised amplifier that Tony demonstrated full filled the potential of the SF’s.
From a very happy and satisfied customer.

Peter Fry

Date of Posting: 20 November 2019
Posted By: Peter Fry
Coherent Sales and service

I’ve been a customer of Tony’s for approximately 10 years – starting with a very basic system and not much knowledge about hifi at all.
Tony is extremely knowledgeable about how to get the best from different components working together. He deals with the complete system and is very good at identifying weak areas in a system and then able to offer the right upgrade or advice.

I have mix of Coherent cables, 4D, 6D and BD and products and somewhat tricky speakers which Tony has managed to get sounding way better than they ever should, which would be beyond most dealers.
Always very generous with demos and loan products, with no pressure on timescales or rushing into making a decision or to purchase and always happy to visit to ensure system is optimally setup and help with fine tuning that can make a world of difference.
Thoroughly recommended - I can’t think of any Hifi dealers who would have more knowledge or expertise in such a wide range of areas.

Clark, Surrey
Date of Posting: 26 October 2019
Posted By: Clark Holden
Last year I made a mistake.
My system has been very stable over the years. Occasionally I have dabbled with different tweaks such as interconnects, mains cables, supports, etc. I was always on the quest for a better sound.
Seduced by the number of glowing reviews and online affirmations of owners, I ended up buying an ex-demo Devialet 250.
The Devialet was highly configurable; beautiful to look. However, after a number of months, I finally had to admit to myself that it wasn’t working out. I wasn’t happy with the sound. Consequently, I spent less and less time listening to music and more and more time fiddling with the system to get it to sound right.
Ended up reverting back to my previous system.
I contacted Tony as Coherent Systems, explained my situation and asked “What have you got that can improve my system, within budget?”
Tony came over to my home with a number of components to try.
He started by replacing the analogue interconnect and then some mains cables. The light-bulb moment came when Tony introduced the Nova Fidelity X45 into the system as a substitute for my Sonos streamer with the Audio Syntheis Dax Decade DAC/preamp. No contest. It was simply better.
However, being cautious, I asked if I could have a further home trial of the Nova Fidelity.
A week later, having switched back and forth between the options, I placed an order for the Nova Fide and a 6D interconnect.
Lessons learnt?
1. Find a good dealer.
2. Get a home demo.
3. Trust your own ears and judgement.

With my previous system, I noticed that I only listened to content that I knew sounded good.
The improvements to my system mean that I can listen far longer without listener fatigue and also enjoy a greater range of music.
Thank you, Tony, for helping me to enjoy the music.

Gary N

North west London
Date of Posting: 23 October 2019
Posted By: Gary N
Coherent Sales and Service

After 12 years of sales and service from Tony and Coherent Systems I thought it was high time to express my thanks to him for his exemplary knowledge, dedication and professional service.

My journey with Tony began when I visited him after attending a Hi-Fi show and discovering the Utopia Micro speaker from Focal. I was informed that he was selling Focal speakers and so I went in search for him. The experience was life changing as I sat there in his audition room listening to music instead of the sound I was so used to hearing from equipment manufactured by
a well known company in Salisbury.

It was inspirational. I did acquire the speakers ex dem and so much more.

Over the years and several item changes, rebuilds and updates I am now the proud owner of a system supplied in its entirety by Coherent Systems. This consists of a BelCanto CD2, DAC3, VBS psu,
Belles A10 pre-amplifier, Belles SA 100 power amp, driving a pair of Vivid Audio B1 speakers. All sit on Black Ravioli on a Systems Creative Active rack and are connected with 6D Coherent cabling and

During one of his many visits home he produced a rather heavy metal box, the RTZ grounding system, which he said would transform "everything". He proceeded to connect methodically several cables at a time demonstrating the improvement each connection made to the music. The result was so obvious that I acquired the Model Two there and then. Another inspirational event.
The RTZ has delivered music as I like it to sound. It has allowed my system to shine through and deliver a relaxed upper frequency, solidity, good timing and rhythm, decreased noise floor and great leading edge as well as stage depth and transparency.

Over the years I have known Tony, he has always delivered an amazing service second to none. He will travel no end of miles to deliver and set up equipment to his satisfaction.I am delighted with my current system which gives me a great deal of pleasure.

I have no hesitation in recommending Tony and Coherent Systems unreservedly for his service, knowledge, willingness to help and advice, and his friendship.

Thank you

Albert G

Date of Posting: 21 October 2019
Posted By: Al Guillem
Coherent Cables and RTZ Grounding

Spent another small fortune at Tony's magic emporium over the summer months. Some friends are mystified as to why audio accessories should command the kind of money that they are happy to spend on motor vehicles. Then again they tend to be indifferent to music. Pity for them.
I now have an entirely Coherent weave powering my audio system and I have to say that the sum effect magnifies the considerable individual qualities of each cable and interconnect. Mind you having said that the one BD cable I possess (aside form the umbilical link between the preamp and its power supply which is also BD) is absolutely awesome. It is substantially more expensive and is also thick and inflexible, almost rigid, rising arch-like from the power master to my TAD player, but the sound! Multi-dimensional technicolour! All the other cables are 6D. You get more transparency and detail, a lower noise floor with the music emerging from a silent background and more nuanced, textured layering with a fast, solid and tuneful bass.
I was then enticed by the RTZ grounding system and bought an ex demo RTZ CR which takes four grounding cables from my TAD player and 4 from my Belles preamp (it can take a maximum of 18!) I don't even pretend to understand the science behind it but in Tony's words it is a 'game changer' and it's difficult to argue with him. Tonal accuracy is significantly better with even greater transparency, instrumental detail and separation, solidity and three-dimensionality, the stage wide and deep and background silence. The man is something of a wizard!
I should add that, as ever, the service is exemplary and the expert knowledge apparently inexhaustible.

R Edwards

Date of Posting: 23 September 2019
Posted By: Richard Edwards
“I was fortunate enough to receive a loyalty award payment from my Employer and had my eyes/ears set upon a Nova Fidelity X45 Pro.
A quick Google search introduced me to Coherent Systems who were conveniently situated in the same County as me.
After a couple of very informative emails from Tony I arranged a Saturday afternoon appointment and my Wife and I were treated to
a couple of hours musical joy, not only sampling what the X45 can do but also what equipment we could marry it up to in order to get
the maximum out of it.
There was no hard sell from Tony (in fact he suggested that for our budget the slightly lower spec X45 would suffice without much compromise).
We left with a Belles Aria amp and a pair of Quadral Aurum Galan 9’s, Track audio speaker stands and Coherent 4d cabling.
Tony installed the equipment at our house and is always available for any after-sales questions/suggestions.
We are delighted with our new musical set-up and have no hesitation recommending Coherent Systems.

Neil and Anishka Irving

Date of Posting: 19 September 2019
Posted By: Neil Irving
Coherent RTZ Grounding system update:-

Playing with extra special Coherent BDU cables for the RTZ grounding system and working through the current playlist with music I know very well. Need to understand and put into sensible English what has happened to the sound?

Consider this a draft! First pair of RTZ BDU’s plugged into the CD/Pre/DAC subtle it is not, filling in gaps that were not evident previously most odd. Second pair into the TAD power amp seems to have made big changes, mostly to the bass, probably detail too. Only swapped out the 6Ds once to the BDU so far. Very keen to listen to the music
Strengthens my view (and a growing one by those that have heard one) that a grounding box, certainly a Coherent RTZ is an essential part of a serious hifi system
As Tony works through his metallurgic repertoire I tried out his latest top end cables for the RTZ, the BDU version. They (RTZ BDU cables) make a substantial difference over the previous 6D models. Detail, separation, with big changed in some albums that have the bass recorded properly. Not cheap but now a permanent fixture in this system.
Auditions available!

M Griffiths Surrey
Date of Posting: 17 September 2019
Posted By: M Griffiths
I have been very impressed by the recent upgrades that Tony of Coherent Systems carried out to my NovaFidelity X40 Streamer.

I purchased the Streamer around a year ago from Coherent Systems and it come with some modifications by Tony prior to me purchasing it. Having been happily using the X40 for a while, I wondered if it was possible to obtain even more performance out of it, so asked Tony what else could be done.

He recommended upgrading three of the voltage regulars and some capacitors changes in the digital input power supplies and DAC sections for what seemed like a very reasonable sum, so I decided to have it done.

I collected the Streamer from Tony after he’d had it for a short period and I plugged it in and instantly heard a significant difference, and that was from cold.

After having it in the system for a while I found the sound improved even further, it opened out and the slight faintness of brightness has disappeared. The sound seems so much more open, dynamic and clear without any levels of fatigue.

I am exceptionally thankful that I have found such a good Hifi Dealer in Tony and Coherent Systems, and look forward to many further opportunities to improve me system in the future.

Paul Berkshire
Date of Posting: 21 August 2019
Posted By: Paul Downs
Hi Tony, apologies for the earlier panic, I’ve calmed down now with my music! I must say initial signs are very positive, there appears to be more clarity and drive with more punch. I note as well that the background on the vinyl playback is quieter, I think some of the components were a bit tired before resulting in more noise. The upgrade components have obviously had a good effect, perhaps a good recommendation for your cables if they make the system flow better.
Thanks again for the very professional service and advice. Hopefully I can visit you at some stage to hear what other improvements are feasible to my system.

Eric North West
Date of Posting: 06 August 2019
Posted By: E Mawson
Coherent Systems technical sales and service

I had a Coherent ultra low phase crystal oscillator module installed into my LKS MH-DA004 DAC. It's effectively a femtoclock with very low levels of jitter and high stability. Tony took his time to find the ideal voltage rail, and the module itself was positioned right next to the two ESS 9038 Sabre DAC chips with the clock signal going to the pads vacated by the outgoing crystal. Installation was neatly done and Tony's test equipment and knowledge very impressive throughout the operation.

The clock output from the Coherent module looked like a perfect sine-wave and spectral analysis showed excellent purity and a low -80dB noise floor. This is considerably better looking than the original clock from the stock Crystek 575 oscillator.

I've had it running in my system for a few weeks, giving time for the LKS to achieve full burn-in, and I'm very pleased with what I'm hearing. Over the original, there is far more musical flow, detail, texture and a well developed wide and deep sound-stage. There is startling fine detail, no harshness whatsoever and very good - and occasionally shocking - dynamics. Overall, vividness takes a significant step up towards reality.

My LKS really shows what the superb dual ESS 9038 DACs are capable of now. Huge detail, propulsive rhythms, vivid and palpable performances, wonderful voice reproduction. I thoroughly recommend this module for improving the performance of a quality DAC.

M Taylor

Date of Posting: 03 July 2019
Posted By: Martin Taylor

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