Whilst contemplating getting a newer and more expensive integrated amp, I stumbled upon a recommendation for John’s service. After swapping a couple of emails I decided on upgrading my amp, expecting to gain subltle and at best moderate improvements.

My expectations have well and truly been exceeded, the NAD is now producing clearer and more defined bass, a midrange that is a level or two better than before and with a sweeter upper range. It is if a blanket has been removed from my speakers, in fact I am now appreciating how good my speakers are!

Great service and great results. Thank you John

Justin McRoberts