05-28-2011, 02:16 PM
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Join Date: Dec 2008
Location: Silicon Valley CA, Storm Lake IA
For an amp that potentially puts out ~350 watts; you are a little shy of the amps requirements from your power supply. It is always a fair plan to assure more amperage available from the power supply than the amp will need.
I would guess that if you are fully driving the amp input properly, it should do 275 and need about 35 amps. If you push the amp fairly hard; then 40 amps may become necessary. A rule of thumb, is to have a supply that has some 'head room' of 5-10 amps more than the amp will draw. Reason? So that you don't over-tax it and have a failure. It is also true that when the supply is taxed to the maximum, you will also have a voltage drop as well, which I'm sure you don't want/need either.
Just some thoughts . . .
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Last edited by Robb; 05-28-2011 at 04:29 PM.