After reading your test results I decided to try out my new true rms fluke DMM, Its got a min/max record feature and i couldnt find my test tones so i just cranked some music. I only got to 30v before i felt i had enough. I would never listen to music that loud simply because its no longer enjoyable. I'm not sure I wouldnt want to play music at that level for hours on end because I doubt that my amps can dissipate the heat fast enough without the help of fans.

Class A/AB amps generate a little more heat than these Class H types

Haoleb's Audio/DIY Website