Hi Ampzilla; Sean has a good list of possibilities above. One I would add is becoming very, very familiar with a particulat recording with one of the amps. I mean get so familiar that you are almost sick of it-- then put in the other amp and see what you think. If the music still sounds the same, I would guess there is a weak link somewhere else in your system.
At some point you need to become totally confident in your hearing and hearing perception(s), ie maybe they really do sound the same. Although I would guess that there should at least be a difference in bass character/quality. Good Luck. Craig.
At some point you need to become totally confident in your hearing and hearing perception(s), ie maybe they really do sound the same. Although I would guess that there should at least be a difference in bass character/quality. Good Luck. Craig.