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RE: battery-powered cMP !

While getting off ac mains is always desireable . . .

Designs such as John Swenson's choke-based PSUs (there are others) should give batteries a pretty good run for their money without the hassle. I forget who it was who said he was planning to try them on a cMP^2 rig.

I did hear from an inmate from, IIRC, Australia who built some and was delighted with them but, sadly, I don't think he's still on the list.

Batteries aren't necessarily as quiet as some think (though I can't speak about LiPo's - whatever they are). See e.g. link and also:

http://www.diyaudio.com/forums/chip-amps/13121-battery-powered-supplies-21.html#post187556

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