Question about Rockford Fosgate Power 501BD Car Audio Amplifier

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Jerky rca input/beeping from ground connection

Had this amp 3 years now and over the last 2 weeks it started making a beeping noise from the ground connection...i opened it up and saw nothing only i could pinpoint where the noise is coming from....just over the last week everytime i go over a bump the bass thuds hardcore...i have 2 of these amps so i took the rca's out of tis one and put them in the other one and it doesn't happen..so i put it back in the other amp and wiggled it a bit and the thudding went crazy..somthing loose?? i am considering taking it into a repair shop but i want to check here first to see if there is a simple,cost effective solution BTW: the amp itself still works great but the beeping and the new thudding are cause for concern any input would be appreciated

Posted by Chris Gore on

  • Chris Gore May 18, 2006

    i have 2 grounds on the chassis one to the capacitor and 1 to 3 amplifiers via distribution block...this is the only amplifier with the problem..i am using all 4g wiring for power and ground....looks like a repairman will be recieving my amp sometime soon then...thanx anyway for the advice

  • Chris Gore May 18, 2006

    right where i plug in the ground wire there are 2 coils and some capacitors(i think) it is coming from there just behind where the wire goes in

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From what you say i feel that you have a dry joint around where the rca socket is soldered on to the board- use a magnifying glass and plenty of light to look around the sockets,They may be soldered under the board which means you need to disassemble the whole amp in most cases. a dry joint is basically a slight crack(very hard to see sometimes) around the solder which causes the subs to thud. but i might also be a faulty rca socket. Pretty easy to fix if your good with a slodering iron,all you have to do is to reheat the solderpads so the solder flows again and then hopefully it will set properly without any dry joints. If not take it to a tech and he should have it fixed in no time and should only cost like 20-30 bucks, might be a little more if you need a new socket but not much,probably another 10-15 bucks.You said that you could pinpoint where the beeping was coming from, Can you tell me where or what it is coming from?

Posted on May 18, 2006

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Sorry man but this sounds like the start of a horror flick???lol Ok Sorry man but if it occours from the ground then you need to move the ground and reinforce the ground of needed as maybe the chassis or ground your using is not up topar as a matter of fact try running a direct ground from the battery to the amp at least a size 10 to 08 size wire. Good luck

Posted on May 18, 2006

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