Hi Anthony,

I've been testing a pair of your nxV500's in my current reference system which comprises of:

B&W 800D Floorstanding speakers ($35,000 a pair)

2 x Classe CA-M400 mono block amplifiers ($22,000 a pair)

Classe CDP-202 CD player with inbuilt volume control ($11,000)Kimber Select Interconnects and Speaker Cables ($7000)

And previous systems consisting of Mcintosh, Mark Levinson and Krell electronics.

I decided to put the nxV500's head to head with the Classe M400's, even though the nxV500 only has 300W/8 which is 100W less than the M400, the sound quality is second to none. Right after hooking them up and pressing play on my reference track of Diana Krall - Live in Paris - Track 1. I Love Being Here With You, it was clear when the bass rolled into the room, it didn't jump or snap into the space like it was a leashed animal, and when Diana's voice is first heard it bloomed beautifully and was sensationally convincing.

The build quality of your product is excellent and it uses high quality capacitors too! I always like to know what the almightly dollar really buys you, and closer inspection of the M400, shows cheap capacitors and internal wiring, including the XLR/RCA interconnect wiring.

In summary the nxV500 is smoother and has greater overall coherence that the hugely expensive mass produced Classe CA-M400 and because of this the M400's have been given the boot and sitting in their place is your very own nxV500 mono blocks!

Thanks again!

Nicholas H Canberra, ACT.

The NXV 500 together with a DAC I have modded and an old Philip CD Player and a Nelson Pass Balanced Bride of Zen delivered the best sound ever in the HIFI club. Sometimes we have some very expensive stereo in the club. 1 month ago only the AR 610 mono amps had a price of $100.000 AUD

So we are extremely satisfied with the nxV500

Cheers from E.Sæterdal

Denmark

Hi Anthony

I completed my 2ch amp using your NXV200 modules a few months ago, and I must say that the sound quality is absolutely fantastic. Thank you for bringing

this level of quality to an affordable level.

Bartek M, Victoria, Australia

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 your wonderful kits! As I mentioned before I had many good amps but, I was never happy with the sound and details. There was always something. well let’s start with these  "small tanks" They are small, I had it for a couples of hours playing with my Polk audio A1 really loud and the heat sink got barely warm. The sound is awesome! I try to listen if I could hear some back noise and I though the amp was unplug so I checked it...but the amp was on! No back noise at all; boy! There is one thing I can say to you............ Very well done! You know me I will get more for sure. Now I only have to wait for these input caps to arrive and I will install them. So far I do not have words to thank you enough for these top notch products.

Your service and products are the best!

Thank you so much Anthony.

Jose Vejar

New York, USA

Hello Anthony,

I compared the nxV300's with my Threshold 450 listening on the Relco Mantis loudspeaker.

In my opinion the nxV300 is more detailed and I will sell the Threshold.

Best regards

Boris

Burgdorf, Switzerland

Hi Anthony

After building my new power amp. (HPA-nxV200 modules)

The result is an amplifier, which is, afterabout one week of burn in, able to deliver a very wide soundstage, a powerful, controlled and well articulated low frequency range, smooth and liquid mids and very detailed but never fatiguing highs. But much more important, this amp has a very own but yet very natural sound signature. It really shows me something about my source equipment, but remains playing everything in a very musical manner. I think this is an outstanding product. It has its own signature, not trying to copy any other amp, and it plays just tuneful, full-bodied and convincing. I really searched for some drawbacks here, but wasn't able to find any!

My reference for comparison are some Rotel integrated amps (RA-935, RA-931mkII) and some Naim Audio power amps (NAP 140 and NAP 160). My speakers are some MM Serie Master by Reference 3a, an early version of the current model MM de Capo i.

Thanks for offering such a great product to the diy-oriented!

Kind regards!
Martin Balszuweit
Germany

Full comments and photos found in the web site Gallery!

Hi Anthony

 I have been using your amp (nxV200)for over a month now, and have made my decision on its sound quality. It is now my main amplifier and I have sold my Duevel amplifier (I see the new price for these amps is now nearly US $5K)

In my system it gives my speakers a bit more control on bass lines. I listen to a lot of female vocals and the treble is just that bit better suited to my hearing. So you have developed a stunning unit in my view.

All the best

Andy, New Zealand

Hi there Anthony!

..well, the modules (Nxv200) are simply astonishing!

the expected control and resolution on the whole bass region

(sub bass to mid bass) is amazing , especially considered that I use the"old"

psu from my NAD C325B (one toroid, say 230 W ,one integrated rectifier,

two (unknown) 15000 electrolitics) for both the two modules.

even the rest of the spectrum reveals far better resolution,

one of the amazing thinks that I hear is the "life like" sound of metal clash

(in movies effects for example, or cymbals..)

however absolutely non fatiguing sound!

Very well done Mr Anthony E Holton !!!

I'm really a satisfied customer.

Massimiliano Colarusso, Italy

Hi Anthony

I would just like to point out that I think your build quality is far superior to the Classe Audio, I've been doing some A/B testing of the 2 x Classe CA-M400

( http://www.e-hifi.com.au/classe/Amplifiers/cam400.aspx ) and the nxV500's.

I think the nxV500 are better, the M400's are $10.9k each!

You have made some fine amplifiers :)

Nicholas H

Canberra, ACT

Having upgraded my speakers I was looking for something a little better then my monobloc chip-amps, but wanted to keep the chassis as there a good fit with the rest of my system.

So using 45V rails and 20,000uf per unit, in went the HPA-nxV200 modules.The first thing that struck me was the improvment in the bass, very quick and tight.The treble was smooth and detailed, and the resolution just outstanding!

I'm very happy with the results.

Regards

Mark G.

Melbourne, Australia

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 listening to them.
 
A truly exceptional module you have designed.

Guitar string resonances reveberate with authority! Walls are vibrating though the sub is off. So far this kills my Marantz amp in all aspects; warmth,clarity,soundstage,coherence and speed.
The slightly bright nature of the amp is neutralized by the mellow sounding Vifa tweeter. What emerges is absolute listening pleasure!

Dinesh, Melbourne, Australia

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.

Full review found in Gallery section, a must read !

Peter from RZaudio (aka rabbitz) . NSW, Australia

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

Wow. Everything was there. Crystal highs, space, tight and deep bass. Everything was so nice balanced, no matter what type of music we were listening. After few hours and a few beers, my brother almost started to cry when we were listening Peter Gabriel's first album

Danko, Israel

Anthony made a Stereo HPA nxV200 Amplifier for me , the improvement over the Arcom AVR300 is mind blowing More detail and bass control in movies [war of the worlds] .

Jeff William SA, Australia

HPA-nxV500 Modules

This is super sound. I am so happy…:-), Huge detail. In the whole audio spectrum, tight and controlled bass, The middle range is so forward and clean without any harshness, No harshness in the top end, Super high end sound. Perfect for me. A little about myself I am 39 years old. I have been interested in HIFI since I was 12 -13 Years old. And I have heard so many amplifiers in my time.

Thank you very much for good product…

Kind regards

Torben, Denmark