Originally Posted by fatbottom
If you can't the difference between two amps, get your ears cleaned out. I can easily tell which sounds better between two different stereo integrated amplifiers. Plus changing from a av amp to a stereo integrated amp.
Your claim is, well, quite extraordinary. Ignoring that DBTs show us that in a level-matched, blind environment, listeners generally cannot pick two amplifiers apart (when they're providing the same output), you probably aren't testing in this kind of environment (are you even using the same room, level-matched, with the same speakers, in the same manner, with an A/B selector?). So that means we've got all sorts of variables left flying around, and you can't say with any certainty that you're really hearing one as "better" or even "different" - there's too much doubt and too many uncontrolled variables. It doesn't stand up to any form of scrutiny; if I tell you I disagree I've refuted your claim and disproven you (this is simple debate, and is not an attack on your personage). In order to make such a claim, and have it withstand criticism, it has to be repeatable and measurable (and subjective hand-waving will not change this). Finally, if you feel so strongly about this, there are a NUMBER of open challenges (some with exceptional monetary rewards) for being able to pick any two amplifiers (or cables, or whatever else) apart in a controlled listening test. And all of THIS aside, even IF there were such differences, they will be so buried in the spectrum that you're unlikely to hear them in normal usage - speakers, room treatments, and the media being played back are going to bring far more distortion and "trouble" to the table, and those things should be addressed well in advance of worrying about which amplifier "sounds" better or any other such rubbish (cable lifters, vibration reduction, acoustic exciters, shakti stones, cables, etc).
That said, there are going to be differences between AVRs - as phantom52 points, room EQ suites can make a difference. I don't consider it worth the time to compare three or four products in this regard though; "good enough" is good enough. There are bigger fish to fry when it comes to setting up your listening room properly.