volts drop below 10v at high vol?
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=80373
Printed Date: May 07, 2024 at 3:16 AM
Topic: volts drop below 10v at high vol?
Posted By: downstarinc
Subject: volts drop below 10v at high vol?
Date Posted: July 16, 2006 at 10:28 PM
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?
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jl audio..nuff said
Replies:
Posted By: DYohn
Date Posted: July 16, 2006 at 11:32 PM
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
Posted By: 5150azn
Date Posted: July 17, 2006 at 11:09 AM
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.
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Tell the Snap-On guy I'm not here!
Posted By: aznboi3644
Date Posted: July 17, 2006 at 5:19 PM
Um...amps that put out lots of power require lots of power.
Posted By: jeffchilcott
Date Posted: July 18, 2006 at 2:30 AM
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.
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2009 0-1000 Trunk WR 154.0DB 2009 1001+ Trunk WR
2007 USACI World Champion
2007 World Record
2006 USACI Finals 2nd Place
Posted By: cleophus
Date Posted: July 18, 2006 at 2:57 AM
Visit your local welding supply store and get their best 00 fine grain welder cable.Your problems will be solved.
Posted By: Aruman
Date Posted: July 18, 2006 at 7:29 AM
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.
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Shaking The Neighborhood
Posted By: DYohn
Date Posted: July 18, 2006 at 8:32 AM
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
Posted By: jeffchilcott
Date Posted: July 18, 2006 at 6:20 PM
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
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