Hello Anthony!Well I have finished my amplifier using your NXV200 modules. Let me tell you something, I am very picky with sound quality. I have had so many amplifiers that I lost count lol just to name some of them:Portal Panache, Adcom, Marantz, Bryston, Acurus etc and I have also build many kits including gain clones, chip amps LM3875/LM3886. let me tell you, I am still waiting for the input sonic caps 3.9uf from Sonic craft. But I could not resist waiting so here I am listening to music. Well let’s start with the quality of your boards, they are top notch, yeah, yeah now you want to know if I like the sound right? Well I have good and bad news....The bad is I lost a lot of time looking for a great amps and amp kits! Ok so what is the good news? I just found you and...

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...