Edit: whoops, posted with the wrong (facebook) account. I'm the same guys as lutkeveld
My findings are based on theoretical calculations and practical findings, if you are able to prove me wrong with actual measurements: great! be my guest.
The difference lies in the effective efficiency between AB vs D:
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Posted · Edited by Jesse van der Zouw
Edit: whoops, posted with the wrong (facebook) account. I'm the same guys as lutkeveld
My findings are based on theoretical calculations and practical findings, if you are able to prove me wrong with actual measurements: great! be my guest.
The difference lies in the effective efficiency between AB vs D:
http://sound.westhost.com/articles/pwm-f1.gif
As you know: music isn't a continuous load, but rather a peaky load with a crest factor of at least 10dB
If you look at -10dB (10%) on the graph you see the huge difference.
But full power on your beastly machine is very loud, maybe on normal listening levels (couple of mW) idle current is the dominant factor.