Sam, SO way many years ago… in the '70s, I believe it was SoundCraftsman (maybe it was Crown) talked just about this issue… the leading edge of a transient… I remember one of their sales literature themes described the sound of a scissor snapping…
Their whole point was you needed a “fast” amplifier with large power and current. I can’t remember their rational more than this.
Sam, I agree with you completely… this gets to the whole “why doesn’t it sound real?” issue. That SoundCraftsman ad really had an effect on how I analyze sound… there is something about a piece of equipment that can get that leading edge correct. I think the metric is “Slew Rate”?
Another area that reinforces this notion was when I was dicking with analog synthesizers (keyboards)… when you selected a wave form… when the attack was sharp and crisp… made the sound really “present”.
Anywho, Paul made some vid or comments a while back about Slew Rate and how it was in fashion for a while years ago… I dunno, I think it is pretty important… as long as the amp or other equipment can react faster than the input, I guess it is fine, but I am not so sure. Audiophile principles include over doing it.
Edit: I found an old Carver ad discussing the power demands of a scissor snip… I am 99% sure this scissor thing was started by SoundCraftsman years before (I think it was their Vari-Portional circuit that modded the power supply when needed)… anywho, interesting read and speaks directly to what Sam and Elk are addressing.
Bruce in Philly