@freediver - I own a number of the amps you mention. They sound very nice. In fact, I have a cheap 25 watt pure Class A Chinese amp that just spent significant time in my main system and I was truly impressed with its performance when matched with much higher priced gear. As people have said, I’m sure parts quality could be better and the designs may not be original (not necessary illegal - a US patent is good for only 20 years and that’s assuming it was patented to begin with). Try one out, you might be surprised.
