Can i splice wires for second amp
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=37891
Printed Date: July 14, 2025 at 11:58 AM
Topic: Can i splice wires for second amp
Posted By: pimpincavy
Subject: Can i splice wires for second amp
Date Posted: August 22, 2004 at 12:45 PM
Im going to set up a second amp, can I just splice the wires from the ones I already hasve running to my other amp?? The only one I really wanna do is the power wire, so I dont have to drilla hole in the firewall adn run a whole new wire through the car. So, can I run 2 amps off of one power wire?
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Replies:
Posted By: sienna
Date Posted: August 22, 2004 at 1:49 PM
You can use the same POWER cable to supply both amps but the cable must be of large enough to support the current draw of both amps.
Posted By: pimpincavy
Date Posted: August 22, 2004 at 1:51 PM
One amp is 525W max, not sure of RMS, and has a 40A fuse. The other is 250W rms and has a 20A fuse.
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Posted By: jeffchilcott
Date Posted: August 22, 2004 at 3:11 PM
what size power wire are you running? I always recomend that when you do an install you use 4 guage wire it is not much more then 8 guage and you can upgrade later on with power problems, most 4 guage kits come with a distribution block so you can run more then one amp, if you are running 4 guage you should look into a distro block, should not be more then $20 at a local shop
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Posted By: pimpincavy
Date Posted: August 22, 2004 at 5:00 PM
I ended up running another wire, both are 8G. If I ever upgrade to a bigger amp I will upgrade the wiring as well.
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Posted By: kfr01
Date Posted: August 22, 2004 at 5:25 PM
Just be sure to fuse BOTH wires with appropriately sized fuses close to the battery.
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New Project: 2003 Pathfinder
Posted By: xtreamcc
Date Posted: August 22, 2004 at 5:34 PM
kfr01] wrote:
Just be sure to fuse BOTH wires with appropriately sized fuses close to the battery.
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Posted By: pimpincavy
Date Posted: August 22, 2004 at 6:39 PM
Yes. They both have 60A fuses close to the battery.
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Posted By: kfr01
Date Posted: August 22, 2004 at 9:12 PM
Shouldn't one be 40 or less and the other 20 or less?
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New Project: 2003 Pathfinder
Posted By: customsuburb
Date Posted: August 22, 2004 at 9:17 PM
No, the fuse by the battery is to protect the wire itself, not the amp. If its 8 gauge wiring then you will probobly need a 60 amp fuse at the battery for each.
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Posted By: kfr01
Date Posted: August 22, 2004 at 9:31 PM
Thanks for the correction. I reread this page: https://www.bcae1.com/fuses.htm You were right in that the fuse at the battery is simply to protect the wire. But, it seems that 60 amp is a little large. They recommend a Maximum of 50 amp fuse size for 8g wire. Not trying to be nit-picky, just trying to suggest the safe route to go and learning myself along the way. :-) ------------- New Project: 2003 Pathfinder
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