ok, I still haven't purchased the new amps because I'm still stuck on this whole "Toroidal vs SMPS" dilemma... we're talking about a large PA sound system, 8 hornloaded subs, 8 dual-15s and 4 single-15's, running at full blast for 8+ hrs at a time... built for DJ and EDM music to be played at indoor and outdoor venues, sometimes dirty warehouse power, sometimes huge genset split up through spider boxes, sometimes a nice club with proper wiring, gotta be ready for everything... the big question (still) is - toroidal vs switching power supplies - and how do they perform under sagging line conditions... there are several schools of thought, some people believe in one technology, some swear by the other technology, and some are on the fence like me and just don't know which way to jump... wouldn't mind lightening up my racks, but don't want to do that at the expense of sound quality or volume... I realize that amps don't work at 100% duty-cycle at all times, in fact, they don't at most times... however, what happens when there is that 30-second bass drop that the DJ eq'ed up ??? is it better to have a heavy-ass ol-school toroidal transformer that is storing all that current just waiting to be released - OR - is it better to have a light-weight new-age switcher efficiently drawing consistent power from the source ??? any other thoughts on the matter or useful links to other discussions?