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what gauge wire to use

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Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
Printed Date: May 27, 2022 at 5:22 PM

Topic: what gauge wire to use

Posted By: luckydawg003
Subject: what gauge wire to use
Date Posted: September 17, 2007 at 6:59 PM

I am going to be using 2 gauge wire from the battery to my cap. Then 2 gauge from cap to distribution block. Then splitting to two amps. Should I run 4 gauge or is 8 gauge ok? Also since I have to run my rcas on my drivers side of my car is it okay to run the rca's on top of all the wires underneath the drivers over the ignition wires and stuff..or will that pick up interferance?


Posted By: audiocableguy
Date Posted: September 17, 2007 at 9:59 PM
2 AWG might be way undersized or way oversized. What size fuse are you planning to use? You didn't give enough info.

Year, make and model of vehicle
Make/model of amplifier(s)
Distances between Bat, Crap and Distro.

Posted By: luckydawg003
Date Posted: September 17, 2007 at 10:16 PM
I will probably use a 160 amp fuse. 07 mustang, 2 power acoustic watts 1080 rms. Distance probably more than 12 feet. I know I need to use 2 ? is should i use 4 gauge or 1 gauge from the distribution block to the amps?

Posted By: stevdart
Date Posted: September 17, 2007 at 10:59 PM

That's where you look at the amplifier owner's manual.  It should list the largest gauge that will fit.

Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.

Posted By: haemphyst
Date Posted: September 18, 2007 at 1:20 PM
Well, since #1 is LARGER than #2, it wouldn't make sense to do that, now would it? A pair of #4's from the distro to tha amps will be perfectly acceptable.

BTW, 2AWG is far larger than you have to use. My math, at 50% efficiency (which is erring on the side of caution) gives me 150A which is perfectly safe for a #4 wire to carry, and #4 will also work (if very SLIGHTLY over-rated) with your desired 160A fuse.

Power Akoustic, BTW, is a bit generous with their RMS ratings, I'd bet more in the 700 watt range, so, even there a #4 will suffice.

It all reminds me of something that Molière once said to Guy de Maupassant at a café in Vienna: "That's nice. You should write it down."

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