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P150 Repair and Upgrade

Jan 05, 2021 by Anonymous
Item Repaired/upgraded: Musical Fidelity P150 power amp 

I’ve deliberately delayed submitting this review to let the amp settle down and bed in but I’m very impressed. The control and clarity that the amp now has would cost an awful lot of money if buying new but this is achieved without sounding clinical just smooth authoritative powerful sound it’s an addictive mix. I’m now scouting the second hand market for another P150 and if I find one it’s going straight to John for him to work his magic.

KW 250s

Jan 04, 2021 by Anonymous
Item Repaired/upgraded: Upgrade 

Now that I have had time to listen properly and to after a lot of tinkering with my system finally got to a place I am happy with I feel able to review John's work.
The first most obvious difference was that the sound seemed airier. More space around the notes and instruments, generally more clarity was evident and this has continued to improve as it runs in. Leading edges of notes are now so finely etched, so clear that it is quite astonishing.
Bass weight has also increased markedly. On certain pieces the whole room moves, you feel the depth, subterranean depth but not at the expense of clarity and definition.
Low level listening is remarkable in that clarity and space- up, down, left, right, beyond the speakers- is now tangible but not in a regular 'hifi' way but rather it just sounds like music.
I had considered getting a phono preamp as the gain from the originally spec was insufficient for a relatively low output MC cartridge. However this is no longer a problem- quite what John did I have no idea but the difference is considerable.
Of course I now know what people mean by bad recordings such is the transparency of this system but that is a price I am prepared to pay.
Finally to say that my speakers are by no means inefficient and could play happily with a valve amp however the MF now commands them with an iron fist and the result is spectacular.
A great service and remarkable result. I am a very happy customer!


Dec 31, 2020 by Anonymous
Item Repaired/upgraded: Testing123 

This is a test and it will be deleted.

Musical Fidelity NuVista 800 Upgrade

Dec 21, 2020 by Anonymous
Item Repaired/upgraded: Musical Fidelity NuVista 800 

John recently carried out a stage two upgrade on my Musical Fidelity NuVista 800 Amp. His work transformed what was already a good amplifier into an excellent one that has sound quality of a much higher level of quality. The soundstage is precise, realistic and has excellent composure making listening to music even more of a pleasure. Thoroughly recommended.

Musical fidelity a100 rebuild

Nov 22, 2020 by Anonymous
Item Repaired/upgraded: A100 

JS audio gave my A100 a full rebuild for £600. I have had the amp home for around two months and used it daily. I left it a little while before leaving a testimonial ,to be as helpful as I could to anyone considering this for their amp.
I totally recommend the service, the a100 was already a good amp , but is now unbelievably good.

JS Audio Repairs , USA 5.0 5.0 164 164 In-short I am very impressed and completely satisfied with the difference the upgrade has made. John has simply worked wonders. The depth, detail and base especially, have improved