volts drop below 10v at high vol?

Ok i got 2 jl audio 1000/1's, 1 jl audio 450/4, 2 jl audio w7 13.5, yellow top optima, and 2 alternators (140amp & 100amp). When i listen to the stereo at high volume, it drops the juice to below 10v, causing my 4ch to reset. The 4ch doesent go under protection, no speakers are grounding out and i have done the big 3 with 1/0 wire all around. I dont know why there isnt enough current having 240+amp alt and all...do u guys have any ideas to troubleshoot?jl audio..nuff said

Do the math.  Each JL 1000/1 can draw 100 amps.  The 450/4 can draw 60 amps.  Your car probably uses somewhere in the vicinity of 30-40 amps.  Plus, your alternator output ratings are at max RPM, not at idle or slower speeds unless you have geared your pulley system appropriately.  Your electrical system is being overloaded.  My recommendation is different alternators (shoot for 400 amps total) or get rid of one of the 1000/1's.Support the12volt.com

I never did the math. But I used to have 1 JL 500/1 with 1 10" w7 in my 96 honda accord. Was that alternater enough? I dont think it was. Kinda funny that even a modest system like that could overload an electrical system.Tell the Snap-On guy I'm not here!

Um...amps that put out lots of power require lots of power.

look into an domonick irragi cs-144 alternator.    they supply 300 amps at normal crusing speeds and 165-175 at idle. be prepared for a sticker shock, but well worth every cent.2009 0-1000 Trunk WR 154.0DB 2009 1001+ Trunk WR

2007 USACI World Champion

2007 World Record

2006 USACI Finals 2nd Place

Visit your local welding supply store and get their best 00 fine grain welder cable.Your problems will be solved.

Hey Jeff what model of the Iraggi cs-144 put 300A and 175 at Idle? and do you know it's lenght? i may be able to try fit one in my corolla, thnx.Shaking The Neighborhood

cleophus wrote: Visit your local welding supply store and get their best 00 fine grain welder cable.Your problems will be solved.

Not if he's overloading his alternators it won't be.

Support the12volt.com

Aruman wrote: Hey Jeff what model of the Iraggi cs-144 put 300A and 175 at Idle? and do you know it's lenght? i may be able to try fit one in my corolla, thnx.

The CS-144 is the model....I am not sure on the phisical demensions on that alternator email bretharbison@comcast.net for phisical demenisions and details 2009 0-1000 Trunk WR 154.0DB 2009 1001+ Trunk WR

2007 USACI World Champion

2007 World Record

2006 USACI Finals 2nd Place