Bombaywalla, I generally get your points about slew rate specs and the impact on bandwidth, especially if there are large power demands placed on the amp at higher frequencies.
FWIW, I seem to recall many years ago that I spoke with Leonard, ARC's former customer service rep, about the slew rate issue. Len explained that the design of an amp takes into account many factors and compromises, slew rate being just one of many. The same hold true for negative feedback, DF and so forth.
So, in the end, Len wisely said that it comes down to how does the amp in question sound in real life operating conditions taking into account all of these design considerations and trade-offs. That's what engineers do all the time.
As to your specific point that a 10K square wave pic might not look so pretty at high power outputs ... well that might be true. But as we all know, most of an amp's power demands are in the bass and midrange frequency spectrum.
I surmise that listening to an amp pumping even 50 watts of power into moderately sensitive speakers at 10K Hz would likely melt your ears ... assuming the tweeters could take the load.
Al ... what are your thoughts??
