So if I'm listening at a normal level, I shouldn't be able to tell a difference between a good receiver and separate amp, correct?

I've just seen some posts out there they say you'll hear more detail when using separates, and I didn't know if anyone hear has tested that.

Harman/Kardon DPR-2005 | SVS PB12-ISD | M22s | QS4s | M2s | VP-150