Class AB v.s Class H
you can also see that there’s no reason to have a class H preamp. preamps should be class A unless you have a good design reason (read: trying to achieve a certain sound) to use anything else. but since class H is a high-power tweak of class AB, it has no purpose in preamps.
hope this was helpful to everyone. personally, i think the poll is a bit silly. if it were between amps with switching power supplies and low-frequency power supplies, it would make sense. after all, getting rid of the big power transformer is the real difference in weight. from there, it’s about shaving the weight of the amp from 20 lbs. to 15 lbs. by playing with different output topologies. that’s nice, but once the amp is 20 lbs., i’m more concerned with getting the best sound instead of losing 5 more pounds. so if it takes a switching amp or a dissipative amp to get good sound, i’d prefer that over the lighter of the two.
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