To Jorge and to Rockadanny:
Classdaudio donot give technical measurements on their products,i guess this is a marketing decision to avoid useless discussions and questions.
When i bought the first sds470 amp (for my daughter), i didnt even imagine that the quality of this amp was comparable to the best ones (i own an Ayon triton).
I discovered it when testing this small amp without any preconceived idea.
Threefriends came at home and after a short listening bought two amps to feed Cabasse end Tannoy speakers.
I cannot know why the quality is so high since i guess the quality of a class D amp depends upon the way the corrections arre applied in the amp electrical flow sheet...and i donot know the flow sheet peculiar features.
I am a french audiophile and have no interest to defend classdaudio, however i think that this information is usefull for audiophiles having a limited budget but also for the rich ones....and i think that we must encourage companies which are progressing with new technologies.