Why not batteries instead of power supplies?

I read about issues with power supplies, like noise from AC outlets, ripples in voltage etc.

Why not just use a large battery that can be recharged? If batteries can power cars, they can for sure power amplifiers.

defiantboomerang10-07-2017 4:37pm

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bdp24 Details Discussions Posts This discussion Message User 10,111 posts 10-09-2017 at 05:04am Copy Comment URL Report Comment Edit Delete The late Gary Dodd produced some very fine electronics powered by batteries. Check out posts on the Dodd Audio and GR Research AudioCircle Forums for discussions about them.
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georgehifi Details Discussions Posts This discussion 10,312 posts 10-10-2017 at 05:40am Copy Comment URL Report Comment Edit Delete I'm surprised nobody has brought up or suggested supercaps. I think voltage rating is too small for them to be used as poweramp supply caps. Only 2.7v unless that's changed in the last year or so. Cheers George
imhififan Details Discussions Posts This discussion Message User 2,221 posts 10-10-2017 at 06:00am Copy Comment URL Report Comment Edit Delete Cost! http://www.mouser.com/Passive-Components/Capacitors/Supercapacitors-Ultracapacitors/_/N-5x76s?P=1z0x...
georgehifi Details Discussions Posts This discussion 10,312 posts 10-10-2017 at 08:07am Copy Comment URL Report Comment Edit Delete Wow it’s been a while, since looking at them. And you can get 48v 83 farad for a "cheap" $1,300 each you’ll need two. Great ESR as well,can you imagine the inrush current!!!!!!! No BS boutique ac voodoo fuses here, you'll need massive circuit breakers http://www.mouser.com/ProductDetail/Maxwell-Technologies/BMOD0083-P048-B01/?qs=sGAEpiMZZMuDCPMZUZ%252bYl9uUUNJQGTDeS0ZKH5mj4e4%3d Wonder who’s going to be the first linear amp manufacturer to start using them, my bets on Dan D’Agostino . Cheers George

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