rear batt using 4 ga. ??

[thephoenixvampi 10+ year member]

still relatively new to all this.

ok, this is my situation - i am running 2 pioneer premier subs (both do 1000wrms, actually getting about 400-500wrms) w/ a performance teknik icbm class-d 3000.

i plan on getting 1 or 2 desent amps for the subs, and as-is my lights are dimming pretty badly. i am currently running a single 4 ga. power line to the trunk (plan on upping that to 1/0 when i get the $$). anyway, i got a hold of a (free) used batt that i want to throw in. is it ok to just use the 4 ga for now?...or is it a bad idea?

edit: i have a cap in-line that i want to get rid of - one reason for adding that batt

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[revrider1 5,000+ posts]

I have 4ga on a rear battery...

 

[loopkiller 10+ year member]

As long as you properly fuse the 4 awg wire, it should be fine to run. Just know that using smaller than recommended wire will drop your voltage due to added resistance. You also should equalize your batteries with jumper cables or something similar prior to installing it in the rear with the 4 awg wire.

 

[Redlineaudio 10+ year member]

Make sure the batt is a sealed one if not you need to vent it out of the car.

 

[thephoenixvampi 10+ year member]

what do you mean "vent it out of the car"?

 

[thevic24 5,000+ posts]

what do you mean "vent it out of the car"?

batteries can give off a noxious gas that could be explosive. if the battery is sealed it will not do this. if your batt is not sealed then you need an air tight box with a vent of some sorts to the outside air.