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Subwoofer power lead thru firewall

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Old 10-01-2008, 12:33 PM
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Default Subwoofer power lead thru firewall

I thought I saw a suggestion on where to run my 10 gage power wire from the sub to the battery in here. I have searched but cannot find it. Anyone have a suggestion?
Thanks in advance,
Old 10-01-2008, 12:36 PM
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I think there was one where they took a lead from the rear speaker or amp harness if you have the bose amp radio.
Old 10-01-2008, 02:56 PM
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Ive got an 07 GXP and I think I did mine in the best possible spot. Peel back the carpet a bit on your passengers side floorboard right below the glovebox and theres a nice big black grommet towards the floor you can drill/cut through.
Old 10-02-2008, 03:11 PM
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Originally Posted by jgardner9@stny.rr.co
I thought I saw a suggestion on where to run my 10 gage power wire from the sub to the battery in here. I have searched but cannot find it. Anyone have a suggestion?
Thanks in advance,
10 AWG?? That's It?
Old 10-04-2008, 06:11 PM
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Originally Posted by 2006ImpalaSS
10 AWG?? That's It?
Mine is 4 gauge....you definitely need bigger than 10 gauge
Old 10-04-2008, 10:27 PM
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i would just save the time and put 0 gauge so you never have to rewire. My 0 gauge bearly holds 2,000 watts @ 13feet or so of cable
Old 10-06-2008, 05:14 PM
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or you could be super cool and do it this way:


no rubbing or issues with damage to the cabling and a heck of a lot easier to get to than the grommet under the carpet.
Attached Thumbnails Subwoofer power lead thru firewall-wire1.jpg   Subwoofer power lead thru firewall-wire2.jpg  
Old 10-06-2008, 05:49 PM
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Originally Posted by deft
or you could be super cool and do it this way:


no rubbing or issues with damage to the cabling and a heck of a lot easier to get to than the grommet under the carpet.
dont do it this way...please...i have had to work on plenty of **** because people do **** this way..the WRONG way.

Open your hood and with a 10mm socket take out your computer (passenger side corner) Behind it there is a rubber grommet...run the wire there and down under your carpet. I can do this wire run in less than 5 min so YOU spend 30 min your first time and take your time to do it right.

BTW 4 guage is fine unless you are running over 2000 watts rms....10 gauge is tooooo small unless you are running a tiny amp (under 200 watts)
Old 10-06-2008, 06:36 PM
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hah! ok, it works and it doesnt get pinched anywhere.......but uh......if it breaks, ill call you to fix it
Old 04-08-2010, 03:26 AM
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Originally Posted by 427Cya
dont do it this way...please...i have had to work on plenty of **** because people do **** this way..the WRONG way.

Open your hood and with a 10mm socket take out your computer (passenger side corner) Behind it there is a rubber grommet...run the wire there and down under your carpet. I can do this wire run in less than 5 min so YOU spend 30 min your first time and take your time to do it right.
Sorry to drag a VERY old post up, but I would love to see how running a wire from what is under the airbox would help in ANY way.

Please do show us all mighty 427Cya
Old 04-08-2010, 05:31 AM
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i have 0 gauge in mine from when i had my sub in there and i ran mine through a factory grommet on the drivers side
Old 04-08-2010, 12:31 PM
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Originally Posted by monte_with_a_LS4
i have 0 gauge in mine from when i had my sub in there and i ran mine through a factory grommet on the drivers side
Cool... I was a bit concerned about trying to run it through the pass side grommet because it would be less than an inch from the exhaust manifold.
Old 04-08-2010, 02:34 PM
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Originally Posted by ChicagoTransAm
Cool... I was a bit concerned about trying to run it through the pass side grommet because it would be less than an inch from the exhaust manifold.
thats where i ran the wires for my gauges and i haven't had problem just make sure you get them out of the way.
Old 04-08-2010, 10:57 PM
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Thanks for digging this up. My speakers and amp came today. I got the 4 gauge cable in a kit. Yeah, I'm guilty of running my LED wires through the door grommet, but hey, it works good for me. Hopefully will start tackling the project next week.



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