Posted February 3, 200817 yr i got the fosgate 1500x1 mini and the amp has 4 gauge inputs.on the fosgate site it sys i will lose alot of power if i go the 4 gauge way.so should i just use 1/0 up until like a foot away from the battery and then run 4 gauge?or will just 4 gauge be aright??
February 3, 200817 yr I would run 1/0 from the battery until you get near the amp, running into a distribution block where you can go down to 4awg.
February 3, 200817 yr It depends on distance. Smaller wire near capacity will have X resistance per foot, more foot of it = lower voltage. It is likely you don't want to use more than maybe 3' of 4ga and the rest should be larger or your 1500w amp will see less voltage at max power, and less output in watts. A little drop does little, but multiply by 15' distance trunk to battery and it adds up. That is why a fuse can be tiny wire, but it is so short a run (1/4"?) that it has a tiny voltage drop. If you don't care about running it at max power I'm thinking 4ga would work, but that usually not the case with sub amps they get run hard.
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