Bumping slowing Fan

I have a Pioneer 760w amp, 2 sony X 12 speakers and when it hits hard my car fan slows down, kinda sounds like it sucks all the power out. Could anyone help me out here and tell me what is going on and how to stop it?

must be drawing the voltage down, but that is not a very powerful amp. You can try a cap to see if it helps, you may need to upgrade your wiring from the battery to the alt and amp, and upgrade the ground wires from the battery to the frame and engine block. As a last resort, you may need to have your alternator rewound for more power or get a bigger one.

must be drawing the voltage down, but that is not a very powerful amp. You can try a cap to see if it helps, you may need to upgrade your wiring from the battery to the alt and amp, and upgrade the ground wires from the battery to the frame and engine block. As a last resort, you may need to have your alternator rewound for more power or get a bigger one.

I agree, Try the cap first... if it's not that i'm thinking it's a alternator problem!

I just wish shops would let you test the cap first - to see if it helps any. I have 2 1F caps sitting in my rgarage right now. I would let someone try it out if they were close by to me. My research indicates that amps the have mostly unregulated power supplies (makes a LOT more power at 14.4V than 12V) would benefit the most from a cap.

Ok, how would you install the cap and how much would all of this cost?

depends on what kinda of cap you get

a 1 farad cap is about $80-100. DO NOT get one with the voltmeter on the top. The + side of the cap is a pass thru for the power wire - you put power wire from the battery to the + cap terminal, then run another wire from the + terminal to the amp. The - terminal of the cap is hooked straight to ground