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Old 10th December 2001, 06:48 AM   #11
diyAudio Member
Join Date: Nov 2001
Location: Harlowton, MT, USA
Oh yeah, I've seen that construction manual before, it is a very simple circuit, you'd expect something like that to be really complicated.

Hey, just disregard all that 4 x 1800W stuff. I think I'm going to make it 8 x 1000W. That will make it easier to build and more reliable. There will be 8 900W into 12 ohm amps in it. I'll probably use that 1kW MOSFET design for them. Every other one will be inverted so I can utilize the both rails all the time. It will be possible then to hook up the speakers for 8 x 900W into 12 ohms, 4 x 1800W into 24 ohms, and many other configs. You've finally talked me into it.

Does anyone know of another amp that uses a transformerless direct line power supply? Nelson Pass once made an amp like that. It was very similar to what I want to do here. Are there (or were there) any mass produced amps with a supply like that? I want to get some info about this type of power supply in audio amps if there's any out there. Where do I look?

[Edited by Kilowatt on 12-10-2001 at 10:09 PM]
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