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

“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

Buckinghamshire
 
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

Hampshire
 
Date of Posting: 03 July 2019
Posted By: Martin Taylor
Coherent sales and service Aurora Sound Vida phono stage

First of all I would like to say a big thank you to Tony for taking all the trouble of delivering himself Aurorasound Vida I purchased from Coherent Systems .
Month or so ago I started thinking about replacing my Paradise phono stage - a highly regarded DIY Audio effort of Joachim Gerhard (Audio Physics, Sonics, Spiral Groove), what I was looking for was small footprint and closely matched performance and Vida seemed to tick all boxes .
First impression , visual , was oh my God I really do not like it's appearance , that Japanese looking wooden sleeve is not my kind of thing but quick conversation with Guy/Pure Sound and problem solved , sleeve could be easily removed to uncover nice aluminum finished case , well done AuroraSound.
Still early hours but Vida definitely is a world class phono stage , so far I find it very difficult to decide which stage I should keep.
Vida is very clean/fresh sounding with plenty of detail also excels when it comes to the lower register , bass is very textured and diversified.
Where it slightly looses is building an atmosphere, Paradise despite being SS design has that valve alike fluidity but the difference is fractional really

Once again many thanks to Tony for first class customer service , definitely will use Coherent Systems again


Equipment used :
Amlification : McIntosh MA2275 , Paradise and AuroraSound Vida phono stages
Speakers: KEF Reference 201/2
Source: SME model 10 turntable ,SME 309 tonearm , Cadenza Bronze cartridge


Slav

South East June 2019
 
Date of Posting: 23 June 2019
Posted By: Slav
Coherent Systems 6D Analogue interconnects

"The cables are quite thick and not terribly flexible, very well made and come with an unknown brand of tightening phono plugs or nicely made XLR locking plugs. A silver coloured shield is visible through the sheaf and that is pretty much it as far as understanding the materials are concerned. There is a family appearance with the power cables, speaker cables and interconnects all having a similar look. I know they are all hand made by Coherent but I know nothing else about them except that shielding is taken very seriously, a characteristic that becomes obvious when listening. They are all cooked on a cable burner before being delivered. However, having spoken with several owners, we all agree that it's just the beginning of the burn-in process and they take a couple of hundred hours at least to give their best performance. This is the same as for the mains cables, although the speaker cables are more 'ready to go'.

So what is it that they do that makes them so special and worth the cost? They are incredibly transparent and seem to add no character of their own. In the best 'cables can only subtract' manner, they do the least manipulation of the signal of any cable I've ever heard. Comparing them with two of the best cables in my possession, the Black Cat Airwave 3202 and Townshend Fractal F1, they reveal the BCs to be quite upfront, vivid and a little loose (similar to the NVA TIS) and the Fractals to be a little recessed in comparison. The high quality of the shielding is revealed as the noise floor is the lowest I've ever heard and music emerges in a sometimes quite shocking manner from absolute dead silence. The 6Ds appear to do nothing to add any flavour to the mix. What you do get is a level of insight into the music that is above what any other cable I've heard can do. The pinpoint focus within the soundstage is the first and most obvious sign of a classy cable. Next is the pin-drop level of fine detail. Finally, its dynamics are obvious but natural and not exaggerated. Headroom is significantly improved and the music doesn't become strained on peaks: for instance, Sade's voice in Why Can't We Live Together doesn't strain yet I can pick up a very slight croak when she's at full stretch. Timing is relayed extraordinarily well in both Steely Dan's Gaucho and Rosie Vela's Magic Smile. The soundstage is very well developed and makes my speakers image like very good small boxes, with the music being completely detached from them. This stands true for good analogue recordings like Dire Strait's Water of Love and Mazzy Star's Fade Into You. If it's dynamics you want, Alt-J's Dissolve Me gives it in spades. Finally, there is so much fine detail in Rickie Lee Jones' cover of Rebel Rebel that it's like listening afresh to something I know so well.

In conclusion, cable naysayers need not apply. If you have a well developed, highly resolving system, on the other hand, and want cables to do it justice, then loan a pair of Coherent interconnects. It's unlikely that you'll want to give them back.

M Taylor

Hampshire
 
Date of Posting: 03 June 2019
Posted By: Martin Taylor
Belcanto Ref150s repair

I was having some problems with my Bel Canto REF150S; it stopped working and made some horrible noises. I was advised to contact Tony at Coherent Systems as apparently he has a great deal of experience with this brand. It turns out that Tony doesn't just supply audio equipment, he has a sound grounding in 'how these things work'. Tony not only diagnosed the issue and repaired the amp, whilst he was working on it he 'breathed on it' and made a few subtle improvements to the power supply.

One caveat is that Tony may introduce you to some of the equipment he represents, and in some cases designs/builds. This is great fun because it will at the very least pique your interest in some extremely accomplished equipment that you may never have heard of.

Coherent Systems are highly recommended for repairs and they will open your ears to other possibilities in the world of Audio.

Martin Butcher - 24/5/2019

Berkshire
 
Date of Posting: 24 May 2019
Posted By: Martin Butcher
Bel Canto VBS 1 power unit for CD 2 and Day 3.5/3.7.
I noticed about a month ago VBS 1 was not supplying correctly,on making inquiries with Bill of Aanvil Audio the original distributor of Bel Canto in UK was given Tony's number to hopefully repair the unit.
Phoned Coherent Systems and spoke to Tony and was advised to send unit back for assessment and hopeful repair ( please note these units are no longer in production at Bel Canto VBS 1 in the US however Tony has several modular s which are only available to him ).
Returned VBS 1 unit Thursday Tony received unit the following day, repaired Saturday and I received it back Tuesday the following week. Excellent prompt service and gave a additional advice on the way my distribution block was arranged and advised the power amps should be on a separate supply, this has proved to be invaluable.
I would suggest anyone with this Bel Canto VBS 1to have it checked to see if the particular modular is working correctly (for peace of mind and low cost).
Also check out the Coherent Systems power leads for CD2 and VBS 1 units, they are a big improvement.
Again thanks for the prompt service and advice.

Gordon H

South West
 
Date of Posting: 10 May 2019
Posted By: Gordon Hurden
Coherent Systems products and consultancy service

Several years back I auditioned the Quadral Chromium 8 loudspeakers, alongside others in the Quadral range. Tony Sallis spent a good number of hours letting me listen, before I decided they were the right speakers to my ears. Tony said I should contact him so he could come round to 'dial them in' correctly.
I thought that can't be difficult.
They were duly delivered and installed by me. Between extensive business travels, I tried to tweak the setup to get the perfect balance, but I just couldn't get it right. So, after several years, I decided to contact Tony, and we agreed a date for his visit
On arrival, and after a short listening session, he looked at my room (which is not a perfect shape), and adjusted the toe-in of the left speaker, to an angle I could not comprehend....but the sound was already so improved
Tony had also brought some accessories, so over an extensive period; we tried successive changes, each adding further balance, sound-stage, and listening pleasure. Black Raviolis under the valve amp and CD player, Coherent speaker cables, digital interconnect, and RCA interconnects, which knocked the socks off my TQ Ultra Blacks. A Coherent power cable into my balanced power supply also provided a big improvement. Finally I was getting the sound I hoped for, and Tony gave me the time and space to make up my own mind.

So the moral of the story is:
- I should have taken up Tony's original offer, it would have saved me much wasted experimentation
- get the right accessories, it will make your equipment come to life, and probably save unwarranted upgrades
- Tony knows what he is talking about, and is a great guide to help get the most from your equipment
Thanks Tony!

Martin Hertfordshire
 
Date of Posting: 09 May 2019
Posted By: Martin Trevers

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