amp turns on and off until it gets warm
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=24405
Printed Date: May 11, 2024 at 10:03 AM
Topic: amp turns on and off until it gets warm
Posted By: flyingfast163
Subject: amp turns on and off until it gets warm
Date Posted: January 12, 2004 at 1:07 AM
i have 2 amps installed one is pushing 2 rockfordfosgate 10in woofers with a 4 channel amp and the other one is pushing 4 5x7's eclipse speakers it is to a 4 channel amp, the one pushing the door speakers cuts in and out until it gets warm then doesn't do it any more any help with this would help thanks
Replies:
Posted By: DYohn
Date Posted: January 12, 2004 at 1:02 PM
Sounds like a defective amp to me. If it's under warranty take it back, if not get a repair quote from a factory authorized service center.
Posted By: Overcranked23
Date Posted: January 12, 2004 at 5:58 PM
WOW do you think that u might do a little troubleshooting first. How is the amp hooked up? Where are the remote wires comming from? and the power wires? Be detailed if you want more help ------------- don't fowl the track
Posted By: flyingfast163
Date Posted: January 13, 2004 at 2:30 AM
ok from the deck i have 2 sets of rca's going to a crossover then from there i have one rca going out to the sub amp which is bridged into 2 channels then one rca going from the high and mid into the other amp and then a speaker hooked up to each channel.remote wire comes from the deck and power wire from batterey thanks
Posted By: Overcranked23
Date Posted: January 13, 2004 at 4:47 PM
I think that you might of missed what I was asking The remote wire comes from your deck right? Than goes to what amp? How do you get your other amp to turn on? ------------- don't fowl the track
Posted By: eargasm
Date Posted: January 14, 2004 at 5:38 AM
check your fuse holder too. i have heard of dodgy ones which have a bad connection to the fuse. it would take some arcing to warm up maybe...
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2001 Ford Fairmont
Alpine DVD, screen,
5.1surround processor,
5ch Class-T amp, TV tuner
and centre channel.
Focal 3way Utopia splits.
VDO navigation. Stinger cap.
Soundstream Exact subs.
Posted By: raydawg357
Date Posted: January 14, 2004 at 6:55 AM
You say the amp is bridged, Are your subs 4 or 8 ohms, and is your amp 2 ohm stable? Sounds like your amp is clipping from the overload.
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Do it right the first time
Posted By: forbidden
Date Posted: January 14, 2004 at 1:11 PM
You need to find the source of the problem and you are nowhere even close to finding it yet . The problem could be the cd, the crossover or the amp. You need to start eliminating equipment to find the problem. To me it sounds like a cold solder joint, thus when it warms up it makes a better contact, this could be anywhere in the audio chain. Start by bypass the crossover all together, run the "faulty" channel direct from the cd player, if the problem goes away the problem should be in the crossover. If it does not go away, next step. Keep the crossover disconnected. Turn all built in crossovers on the amp and if applicable on the cd player to off, no lp or no hp. Take the rca from the front amplifier and plug it into the sub amp, if the problem still exists it should be the sub amplifier, but more work is necessary to find out. If the problem does not exist plug the sub rca into the front amp, with moderate volume only, not loud, does the front amp now start to cut out, if not the problem is not the cd player, but should be the other amp, if the front amp is now cutting out it will be the cd player or the sub rca wire. To verify the rca cable as the cause, swap in a new rca cable on the sub rca channel, is the problem there or not, plug it into both amplifiers to check, if the problem is ther on both amps it is the cd player. ------------- Top Secret, I can tell you but then my wife will kill me.
Posted By: forbidden
Date Posted: January 14, 2004 at 1:13 PM
Does the amp have a power on led, sheck to see if it still lit when the amp is going on and off. It does not sound like the amp is clipping at all from the load presented, it sure does sound like a bad amp, Dyohn is probably bang on.
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Top Secret, I can tell you but then my wife will kill me.
Posted By: DYohn
Date Posted: January 14, 2004 at 2:45 PM
Thanks, Rob. In general, when a piece of equipment operates erratically and the erratic behavior seems to be related to heat, it is not an external ssue (meaning it has nothing to do with the hookups.) It is a thermal fault happening inside the equipment. I have seen amps malfunction in the way described and usually it is a defective component in the input circuits. If the fault is reversed (works fine until it heats up then it cuts out) the defect is usually in the output circuits.
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