uumm... If this were true all my amps should sound the same - correct??? All my amps are powerful enough and properly working.. Powerful enough for what anyway?? Are all my amps neutral? I don't think so, although I could be wrong. At the moment I have in house 3 balanced headphone amps with one more on the way.
All have a different sound. I would label them like this from neutral to some what colored. All balanced, working properly and powerful enough GSX v2 (incoming), CK²III, βeta-22, M^3. However, some may say they're all neutral.
One amp specifically (M^3) I'm currently working with a builder to find a good sound sig that I like by changing opamps. So all powerful and properly working amps does not always yield the same results.
All an amp is supposed to do is to strenghten the signal to be loud enough for you... This is how it should be. If your amp is suitable enough in volts, current, impedance, gain resistors and IS in reality neutral (and stable in all its specs), the result MUST be audibly the same. Otherwise, something is wrong in the design (or the designer didn't want it to be neutral and clear).
Edited by MHOE - 11/14/12 at 3:16pm