Help with power buffer

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keithsplace

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I would like some help with power for a DIY audio amp power supply.
I don't have the required amp draw of this amp, but I would assume about 5 - 10 amp would be plenty.
It's 4 transistor, 18w x 2w +36w sub
It does require dual 12v supply, center Grd. I am getting a torodial 24v center tapped 12v tranformer rated 12amp two x 6 amps.
Should I put a couple caps low voltage side of tranformer. The amp has 2- 6800uf 25v caps after the rectifier on the board? And how would I wire that? As in would they go in series or parallel across the two AC's.
Thanks for any advice, or am I just over killing here.
 

I'd wait til it was built before modifying. Some audio circuits are fairly immune to power supply hum. Is that the reason you are thinking of adding more capacitors?

It's fairly common to add bypass caps [0.1uF] across the filter caps [your 6800uF caps] to reduce RF noise.

A cap multiplier circuit is more effective in reducing the power supply hum. **broken link removed**
 


Well I think I will try with just the transformer as it was designed. As I stated it has 2 6800uf caps after the bridge rectifier. The amp is pre built just board only, all the DIY part is the cabinet, and transformer. But it doesn't state what amperage. So I'll just try it and see.
Thanks for the link, that was informative.
 

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