I have purchased HPA-S400ET to compare with Ncore amps(NC400 and NC250MP both dual mono).
This is one of the best power amplifiers.
- Smaller size than HPA-series box
- Easy to change preferable gain
- Easy to change interface OP amps
I have checked with
(a) default ( 20dB Gain and OP amp = LM4562NA)
At first it came to us, it sounded somewhat shiny than NC400.And details was decreasing from Ncore400.
After burn-in several hours, it changed to smoother and little shiny, to better normal hi-end quality.
It may require some burn-in hours for (maybe) large power supply(SMPS1200A400).
(b) OP amp JRC MUSES 8920 and setup gain 25.3dB
After burn-in I have tried to change gain and OP amps.
I was very surprized at upgraded sound when I changed to 25.3dB and MUSES8920.
I strongly recomend to try to change OP amps and change gain to fit to your audio system characteristics.
You will find the best matching combination with gain and OP amps.
With Size , sound characteristics and adjustable functions (gain and OP amps) , I am very satisfied with LPA-S400ET.