Congratulations on very fine amplifier Anthony, it exceeded my expectations. You should be very proud of this design.The grip it has controlling a speaker is quite remarkable and smoothness is outstanding. 4 hours straight, no bleeding ears, fatigue or head ache.This review can also be found on the following link at Stereo.net.au http://www.stereo.net.au/forums/showpost.php?p=154573&postcount=62Over the last few years I have tried a fair portion of the more popular DIY power amplifier designs on offer. The ones I admit to are from Aspen (AKSA 55, 55N, 55N+, Lifeforce 55), AudioSector (LM3875, LM4780), Aussie Amps (NX150), ESP (P3A, P101), SKA (GB150). I’m not going to compare the NXV200 to any of these amplifiers as they are well documented elsewhere.I accidentally came upon the NXV200 after talking to Anthony on another matter and the entry price for a fully built amplifier module was very attractive. I do not run at super high SPLs but...

Well, I think this post will be little longer. First, I would like to thank Anthony for excellent job he did with this amplifier (Thank you, Anthony).Amplifier that I was using for a long time was one build based on AV400 schematic diagram, and I was pretty satisfied with it. Lower frequencies were very good, high ones were little “pulled back”. This, of course, could be attributed to my diy pcb, not so perfectly paired output transistors, or something else other then schematic diagram.When my amplifier died (I'm not revealing why), I purchased two NXV200 modules, ones with “garden” feedback capacitors. Power supply I build with 500VA 2x35V toroid, 6x10000uF capacitors (not low ESR), two block bridge rectifiers and 680nF + 1Ohm “snubbers”. First tests I did by directly coupling amplifier and my old Sony player's variable output. I was not impressed by result, but I was thinking “Well, I...

I have a pair of stereo amplifiers using your 4X NXv200 modules which were assembled by Mark Houston. I have to say that they are the best amps I ever heard. With experience from a few other amplifiers, yours simply decimate all others. Clarity, soundstage, transparency and speed of bass simply eclipses any other amp that ive heard. They are so crystal clear that they do great justice to my 2 way floorstanders using Scanspeak 18W8531G00 and Vifa tweeter. The amp is dead quiet. I had to strain myself to hear the slightest stirring of noise but it was coming from my hair that was rubbing against the cone of the speaker! I have thrown all my passive components away and set up my active crossover, with each driver independently powered by your modules.The sound is so natural and filled with emotion that I challenge anyone to feel nothing after...