NAIM NAP250 Original clone build thread

Hello jpk73!
i see your new amp is very very stable on square wave it's impressive.

when I improved the stability of my old amplifier on its regulation and amplification board I also found an audible improvement especially with the improvement of the power supply board in fact.

As for objective measurements, I now have new very low distortion loudspeakers and I have done some ABX tests (so on the whole chain and not just the amplifier)

I passed the test at 0.1% distortion at 19/20 which means that the whole hi-fi system is below, a NAP250 being at 0.03% I think my version must be close to that even if I don't have a distortion meter.


https://www.audiocheck.net/blindtests_index.php
 
Thanks to Cristobool's courtesy, I'm also building this amplifier using the 2.3 boards. I figured that since I've benefited from my colleague's work, I should also contribute something. I have designed NCC200 boards that match the dimensions of Cristobool's boards.
Also you can find a picture of my amplifier (still under construction) 😉
 

Attachments

  • NCC200.rar
    NCC200.rar
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  • NAP250_ML1.jpg
    NAP250_ML1.jpg
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  • NAP250_ML3.jpg
    NAP250_ML3.jpg
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