Still not a double blind test, though. How long did it take you to switch between the two?
About 1-1:30 minutes.
Additionally, I wouldn't count an RCA receiver as my choice in the test. Might fit Catbrat's, though.
Why? What's wrong with an RCA receiver? Either all amps are the same or not.
I always said that the closer the amps are, the harder it is to hear differences... if any. Some amps sound different than other while they may sound the same compare to different amps.
All I'm trying to say is that you cannot simply make a blanket statement that all amps sound exactly the same. If it were true, we'll no doubt have "commodity" amps by now.
I only wish someone from Axiom will offer a more expert opinion on this matter.