amplifier cuts off with high volume

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=115045
Printed Date: May 14, 2025 at 3:11 PM

Topic: amplifier cuts off with high volume

Posted By: bahama_papa
Subject: amplifier cuts off with high volume
Date Posted: July 13, 2009 at 12:00 PM

Okayheres the problem my head unit is a 200w (50w per channel at 4 channels) which is only pushing my 4 front tweeters (only 2 channels im using on those cuz they are still stock). My Amplifier is 1000w 4 channel (250w per channel) which is handling 4 speakers.. 2 front door and 2 rear. The front door is 350w each and the rear is 700w each. At first the Head unit was turning off when i took the volume up to 8 but my volume goes up to 30MAX, that was happening because my battery was dying and the engine wasn't running. I jumped the battery and had the car running.. the Head unit stays on but now the amplifier goes off when the volume goes to 10 What could be the problem??

Replies:

Posted By: yimke
Date Posted: July 13, 2009 at 12:47 PM

Where do you have your gain set on the amp?

Posted By: bahama_papa
Date Posted: July 13, 2009 at 1:05 PM

The gain is set to about 3/10

Posted By: DYohn
Date Posted: July 13, 2009 at 1:10 PM

Your problem is most likely any or all of the following: system voltage dropping too low, loudspeaker impedance is too low, amplifier gain is too high. When the amps turn off, what is your system voltage? What is the load on your amp? Your gain is probably not set correctly, but you need to answer those questions first...

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Posted By: ianarian
Date Posted: July 13, 2009 at 1:12 PM

Amp brand?

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Posted By: bahama_papa
Date Posted: July 13, 2009 at 3:57 PM

The Amp is a Powerbank p.1000.. I just went through isolating the speaker wires and came to find out something is wrong with either one of the channels or the speaker wiring. when i took it out the amp stayed on even though i took it up to 20 which was suprising. So i think i will have a look at that wiring, but thanks for the help guys

Posted By: DYohn
Date Posted: July 13, 2009 at 5:08 PM

Yep. Speaker wire shorts out = amplifier overload. You still need to set your gain properly. Check the Hot Topics forum...

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