Ok, so iv been looking at power capabilities of wire sizes and im only running 4 gauge to the back of of my trunk. Now according to 12volt, with the length of the wire it will only be able to take around 600 watts rms of power. Would running my amplifier at 1 ohm, 1500 wrms, stress/overheat the wire? If this is true, maybe ill just run my amp at 4 ohms, (375 wrms) until i can run some 0 or 2 gauge wire once i buy it.

umm the current that 4gauge cna handle is like 135 amps, and on 1500 amps at 12volts that is like 120amps so you are good! also what is your fuse rating you have on that wire?

does this help you at all?

Iv got a 150 amp on the 4 gauge wire. If im good then thats great

you could also just turn the gain down on the amp to say.. 1200 rms and not worry about anything! I say that because 1500 is pushing the limits of the wire and if you have an issue then that could be bad or kill the fuse, but 1200 should still sound nice on that sub!