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voltage drops to 10.5-11.5, is it the battery?

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=93181
Printed Date: May 15, 2025 at 2:15 AM


Topic: voltage drops to 10.5-11.5, is it the battery?

Posted By: bigwilllo17
Subject: voltage drops to 10.5-11.5, is it the battery?
Date Posted: April 20, 2007 at 9:06 PM

i have 3 1200watt kenwoods goin off a 1600 watt brutus. when i turn the radio up, it seems like the speakers are fightin for power. i took my 400watt power acustic out thinkin that was it but it wasnt. im wounderin could it be the battery? i have 2 1.2 frad bass caps in the back, and when the bass drop it seems to be around 10.5-11.5 volts. or could it be that the crossover is set to high or is the amp set. i still dont understand what the phase control and the subsonic filter is for. but what i really want to know is what can i do so my speakers a clear and playin rite



Replies:

Posted By: aznboi3644
Date Posted: April 21, 2007 at 3:32 AM
if the voltage drops to around 10-11 volts than you are having serious electrical problems...I would disconnect the amp first and upgrade your big three...and start looking for a new high output alternator.

10-11 volts is pretty low as your battery usually sits around 12.5-12.8 volts.

My opinion...you should have researched your own vehicle and upgraded the electrical to handle the sound systems current demands.

Keep bumping with that low of voltage drops than you will have a fried amp soon and a dead battery




Posted By: sedate
Date Posted: April 21, 2007 at 4:52 AM

bigwillo17 wrote:

goin off a 1600 watt brutus

Hifonics?  I seriously doubt that thing is making 1600 watts.  Still, I'm sure its enough to give you some voltage headaches.  If that's your only amp I really don't think you need a high output alternator.

Read that sticky at the top of the forum "how to upgrade your big 3" or whatever.

bigwillo17 wrote:

it seems like the speakers are fightin for power

This is an impossibly vague description.  This means nothing.

bigwillo17 wrote:

or could it be that the crossover is set to high or is the amp set. i still dont understand what the phase control and the subsonic filter is for. but what i really want to know is what can i do so my speakers a clear and playin rite

Again, given your description of your issue "seems like speakers are fighting for power" there is actually no way to even begin to figure out your problem. 

Try posting with more information.



-------------
"I'm finished!" - Daniel Plainview





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