ok lets say i have a jl 300/2 and a jl 500/1

what size wire do you guys recommend for power, ground? is 4guage good enough?

also what size speaker wire you guys recommend for a 10w7? i think jl recommends 12guage, not sure... but does it really make a difference?

 

This is funny, our systems will be very much alike.
I've got a 500.1 amp from Precision Power driving my sub. They ran 4 guage power wire to the 500.1 amp, and 8 guage wire to my 300.4 amp.
12 Guage to the sub should be great. Everything I've read says not to over-spend in wire, unless you're going for *show*.

 

The minimum I would recommend would be 10 gauge for the 300/2 and 8 gauge for the 500/1. I would just get a 4 gauge kit with a distribution block and separate the power down to 2 8 gauge wires.

You could probably get away with 20 gauge for the speaker wire because it will only be a few feet long. Just to be sure, go with 16. 12 is not necessary.

 

I agree with al503, use 4 guage and a distribution block.

Do you hear me?

 

http://www.skingco.com/portable_powe...size_chart.htm

Go here to figure out wire guage based on amps and distance. You can get to amps from wattage by dividing by the voltage of the car (~13 volts) i.e. 500 watts / 13 volts = 40 amps.