igbt / cfb amps
hi.
basically i think the high fidelity magazine amp was a crude rip-off from the original analog devices design (bear in mind a.d. had an igbt and a very similar mosfet design).
i think there were several problems with the magazine design , one of them was long wires and another was using the ibgts in multiples (like just suggested here
i agree that listening to the sound is a lot more important than talking specs or topologies, however its not that easu when we live in different parts of the world
im from copenhagen - denmark , any danes here are welcome to contact me for a demo or whatever.
i do not agree that the sirius/gamut is a very good amplifier (sorry , but perhaps a matter of taste) , i have noticed they use a lot of effort eplaining the idea of one giant fet in the output, funny when we know its an industrial fet with many fets in one house

(btw. are they still in business?)
i still think the alexander cfb amp (with one set of output devices , igbts or fets) is a very good amplifier indeed and that it will give plenty of power even for not-so-efficient speakers.
class-d? yes in fact its possible to make very good hifi quality amplifiers using class-d topology , thats another story and perhaps worth another thread.
k madsen -
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