Here's the guts:That's @ 500W4R? If so then I think that's fantastic compared to a big smoking hot class AB car amp.
A teardown to see what a new class D car amp does inside would be ace. It would be interesting to see the PCB, inductors, caps and layout etc.
@amirm - maybe this is a dumb question, but is there any benefit to running a test with all channels driven at the same time? I'm curious if there is any performance dependency when it's all tested together. Perhaps its performance does not equal the sum of its parts.