Preliminary listening impressions - no background hum or buzz, very quiet. Amps sound extremely nice! Nice clarity and soundstage, bass is quick and tight.... my goodness. I would say after about 6 to 8 hrs of play time, the sound really came into its own. The bass improved significantly, sound stage is staggering, highs are sweet and the mids are right where I want them. Listening to this amp play was pure pleasure. I am really looking forward to more "seat time". You really are able to pick out subtleties on a CD that you have not heard before - even with my modest system.Dan Dearlow, Edmonton Alberta, Canada

HPA-nxV200 R2 based  dual mono amplifier Configuration: Dual mono (2 x 500 VA), separate supplies for input stage (2 x nx Volt One) and output stage (90.000 uF per channel). The amp was easy to build and worked as expected “out of the box” The nx Volt Ones needed adjustment, but if you give them a proper input voltage, they behave exactly as described. The questions I had during building were promptly answered by Anthony. And had I bought the right secondary trafos right away, I would not have needed his support at all. Listening Impressions To set my personal bias straight: I have been passionate about Hi Fi for + 40 years, I have heard a lot of gear, including top of the line amps from Audio Research, Naim, McIntosh, Classe, PassLabs,  etc– and I am lucky enough to have a pair of very capable speakers (Audiovector SR6AA), so...

HPA-LSP40seThe first big decision was one case or mono blocks? After 5 min of thought, mono blocks it was.Listening to these amps is very pleasing to the ear. They certainly have that 'wow' factor.No background noise and very detailed sound. Low & mids are very powerful and highs are clean.When married up with the correct speakers and pre amp you can quite easily create a live sound stage sound.Have tested these amps on speakers ranging from $1.5K to $8K with very impressive results.The only problem with these amps is that they show up any weakness in the rest of your system. I had to upgrade my pre amp to realise the full potential of these mono blocks and what a difference it made!The final problem you'll have after building these amps is kicking your friends out.....Well done Anthony.Next project HPA-nxV500.Regards,AnthonyMelbourne, Vic