When I was a 12-14 year old kiddie (early 1990s) with the seed of audiophilia inside of me - though not to be realized for another several years - I still cared about audio reproduction enough to realize some things sounded better than others. E.g. CDs dubbed to those Maxell high bias cassettes sounded relatively wonderful. And the Panasonic boomboxes with BASH label on them sounded a hell of a lot better than any other comparable boxes at the time ;)
As far as voltage rails following the signal, I thought that’s what the Sunfire amps did to achieve their massive power ratings without equally massive heat sinking? Now ironically, the Sunfire Signature II 600 amp I had some 13 years ago still stands as the worst sounding amp I’ve ever owned (I think the old Panasonic BASH boombox was better).
As far as voltage rails following the signal, I thought that’s what the Sunfire amps did to achieve their massive power ratings without equally massive heat sinking? Now ironically, the Sunfire Signature II 600 amp I had some 13 years ago still stands as the worst sounding amp I’ve ever owned (I think the old Panasonic BASH boombox was better).