Over the Christmas/New Year break I built 4 channels of the NCx500 modules with 2 SMPS1200 kindly supplied to me by excellent service as usual from Hypex sales.
As the attached photo shows I did not use the evaluation boards but soldered directly to the NCx500 36-pin connector partly because I did not have space and partly because I wanted to hear the NCx500 boards directly – it was something I had done 8 years ago with the original NC500 boards though would not recommend it to everyone. I also used the buffer circuit built onto the NCx500 board even though it can easily be bypassed by switching some jumper pins. Being hard-wired I did use any software control.
To cut a long story short I was very impressed by the sound quality not only compared to the NC502MP modules I had used previously (and kept one in place on RHS for bass drivers of my 3-way DEQX-active speakers) but also in absolute terms I now feel I have an amplifier that can compete with the best with extraordinary clarity/resolution, tonal balance and speed/PRaT and can forget about the amplifier when designing loudspeakers.
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The long story can be found at www.facebook.com/legendspeakers