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I have a gm-3500t two channel power amplifier and I have a 2006 cobalt and the batterie in the 2006 cobalt is already in the trunk so I wired the 400watt amp with 1200watt cable to the stereo and put the hot wire on the batterie and grounded the negative and wired my subs and my power light is not coming on like my amp is getting no power and I checked the end of the hot wire connected to the amp and there was power so I'm stuck and answers???

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  • 21 Answers

Make sure you have a good ground, and also check the fuse.

Posted on Dec 29, 2013

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Zealot21
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SOURCE: we installed the amp with

Hi,
In car audio always make sure that you are feeding your amplifier with the voltage that it requires, usually 12v to 14v (some amplifiers can do 12v to 18v). If you have a voltmeter, check your voltage reading if its reading 12v above, if it reads 11.9v below & just stays there & keeps on going down then your problem is with your voltage.
The possible causes of the protect light to turn on in a amplifier is: 1. low voltage - the amplifier is not running on its required voltage / is not getting enough voltage 2. thermal protect - too much heat, usually this occurs when an amplifier is in a tight space & the voltage keeps going down this will cause heat. 3. shortage - wire's are touching each other 4. poor ground - always make sure you ground your amplifier to your vehicles chasis
Hope this helps your concern. Have a blessed weekend.

Posted on Apr 24, 2011

  • 112 Answers

SOURCE: Amplifier and sub installation in a boat.

norally grounding them in the same place is ok but it could just theres not enough power from the amp too power two subs try hooking up one and see if that gives you the sound your looking for

Posted on Jul 09, 2009

etirbynnor
  • 655 Answers

SOURCE: amplifier loads

Hello ronnieyannon,
A single 4 ohm speaker wired to each channel, like you have them wired, presents a 4 ohm load. And it appears that you have them connected properly. The 401s is only stable to 4 ohms when bridged, so if you were to parallel the 2 4 ohm subs in bridged mode, the load would be 2 ohms and the amp would most likely overheat and go into protection.

I'd wire them the way you have them wired.

Each channel of the amp outputs only 100 watts into 4 ohms. That is adequate for regular full-range speakers, component speakers, mid-range drivers, and even some small subs. But it is a little low on power for most subwoofer applications.

Hope this helps.

Posted on Apr 23, 2009

  • 7 Answers

SOURCE: Thumping speakers - no power light is on - wired correctly

the amp is going into protect mode due to something wrong in the amp or some thing in the wiring to it ooh yea if you are getting 18v power to the amp that is way to high it should not be higher then 15v if the amp is in protect mode it will not play at all.

Posted on Nov 02, 2008

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