Wiring Help and Power Requirements

[drakken25]

I currently have 2 Alpine MRV-F340 amps in my car. One is running my 2 JBL GTO936 6x9's and the other powers my 4 JBL GTO636 6.5's. They both have 30 fuses in them (if that helps) and I'm unable to find thier max. current draw. I have and Orion MBR70 Battery Switcher installed. The battery in the trunk is a Optima RedTop. The wire run from the front of the vehicle to the back is about 13 ft. of AWG 4 Ga. Both batteries are fused with 80A fuses to the line, and the battery switcher is in between the fuse holders. My Fuse/Distro block off of the RedTop has one 4ga. in and four 8ga outs. Two of these hold 40A fuses (one for each Alpine Amp.) I want to add a JBL GTO1201.1 II amp to power 2 JBL 1220D 12 inch subs. The specs on the GTO1201.1 II amp say it's max. current draw is 115A. My stock alternator is rated at 105A. What am I looking to do to power all these amps? New Alternator? Larger gauge wire from front to back? What gauge wire should I run to the JBL amp (it's about 4 feet from the back battery)? I'm thinking to use an ANL fuse holder and 4ga. off the back battery going to the 1201.1 II Amp...

Also, I'm looking to add another Alpine MRV-F340 in the future. How would you guys recommend I wire/fuse all these?

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[fuzzai 10+ year member]

IM assuming your F340 are 75x4 right? if so its current draw should be i think 40amps. (i think)

I was able to run a 40a, 30a, 80a draw Amplifiers off my stock alt in a sunfire, and i never had problems, then again all this current is not being drawn out at the same time right..

I think you should be fine with your setup. maybe upgrade your powerwire from the front to the back to 1/0awg maybe?

then try out your system.

You will be only using 3 amps right? the 2 alpines plus the JBL1201?

The 2 alpines should be fused at 40amps from the distro, and the jbl if its recomended is 115 then thatw ould be it. im sure you could get away fusing it at 80 or 100..

I know i had my main power wire fused at 60 cuz i didn't have any 80amp fuses, and it worked fine //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif