What gauge power wire to run?

Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=79228
Printed Date: July 06, 2025 at 11:03 AM

Topic: What gauge power wire to run?

Posted By: aedgington
Subject: What gauge power wire to run?
Date Posted: June 17, 2006 at 9:52 AM

This may be stupid, but I come from an IT background, where there are attenuation issues, etc. So here goes:

2002 Lexus LX470, installing:
- 2 5.6" headrest monitors
- 1 250.2 amp
- 2 12w0 JL audio subs
- 1 1000w power inverter

Can all of these be installed from a single cable run from the battery? I was considering tapping the factory amp power wire for the headrest monitors & running a seperate wire for everything else. Is wire gauge a factor?

Replies:

Posted By: aznboi3644
Date Posted: June 17, 2006 at 10:10 AM

4 gauge is all you need...and a distribution block. No need to tap into the factory amp power wire.

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