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Amp cutting off

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Old Jun 10, 2011 | 03:57 PM
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Default Amp cutting off

I have a 900 watt Rockford amp that keep shutting off on me. I think it is getting hot, it shuts off then a couple minutes later it comes back on, then runs a little longer and shuts off again. This amp is about 8 years old and has been used in 2 differant vehicles, could it just be worn out?

I have the amp mounted behind the waterfall in my vert and grounded to the bolt under the waterfall cover. I have a #3 wire ran from the battery to a terminal block behind the drivers seat and a #8 wire ran from there to the amp for power. I did this so if i ever wanted to add a amp i would have everything i needed right there. The amp is powering a 10" sub in the back and my components in the doors, the sub is bridged.

Im also noticing the lights in the car dim a little when bass hits.

if im missing any info you guys need just ask.

Thanks in advance for your help.

Steve
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Old Jun 10, 2011 | 04:21 PM
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Try turning the gain ***** down (approx 30* ?) to see if that helps.
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Old Jun 10, 2011 | 07:11 PM
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I had a 10 year old Kenwood mono amp that did the exact same thing. Before I started digging through wires I just replaced it with another amp I had sitting in the garage and that one worked fine. I took the bottom panel off the Kenwood and there was a lot of corrosion going on all over the place so I just tossed it figuring with 10 years of use I got my monies worth out of it.
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Old Jun 11, 2011 | 12:19 AM
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what model is your rockford?
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Old Jun 13, 2011 | 06:08 PM
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Ive tried turning the gain down on the amp and it still does it.

I will look and see what the model is of the amp when i get home. i know it is a minimum of 8 years old. this is the 2nd vehicle it has been in.

I always see people that have their amps enclosed in fancy cabinets and i would like to build something for mine but i know that amp gets really hot.

Thanks for the help so far guys
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Old Jun 14, 2011 | 04:29 PM
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You could wire up a auxiliary amp fan for some cooling.
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Old Jun 14, 2011 | 05:29 PM
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Hmm...at 8 years old with this problem, I'd look at replacing the amp rather than trying to diagnose and resolve heat issues. They have gotten a lot more efficient (so that heat problem is largely mitigated) and since you've already got the car wired up, shouldn't be too much cost or hassle to replace it.
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Old Jun 14, 2011 | 06:33 PM
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I think im gonna start looking for a new amp... Thanks for the help everyone.

So does anyone have a good suggestion for a descent amp to power a 10" sub and my components that are in the doors. The sub is a rockford and the components are ummmm i cant remember

Should i look for 2 amps and maybe just have one to power the sub and the other one to power the components and the rears? Any suggestions? I know my rear speakers are 5.25 hertz speakers.
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Old Jun 14, 2011 | 08:48 PM
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I love my new Kenwood XR-5S amp (4x80 + 350x1)

PM member C5 BearsFan, he can hook you up with one at a great price
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Old Jun 15, 2011 | 04:21 PM
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JL makes an amazing HD900/5 amp. Little pricey through JL but you can get a good deal on some brand new ones through Ebay. http://mobile.jlaudio.com/products_amps.php?amp_id=537 There is also the JL XD700/5 depending on your budget.

Last edited by 1redz06; Jun 15, 2011 at 04:31 PM.
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Old Jun 23, 2011 | 11:45 PM
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my guess is that your are bridging that amp into a lower impedance that is stable for that particular model amp.
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