Question about Rockford Fosgate Power 1050S Car Audio Amplifier

2 Answers

Noise in my car amp.

My amp used to be fine for a long time. Then one day it started making a humming noise, and the bass would start hitting like crazy with music on or off. I used to just unplug the rca cables. Then the next time id get in it, and plug the rca cables back up it would be fine, and a few days later do the samething. Now its doing this nonstop, if I turn my jeep on i have a low humming noise in the subs which are hooked to the amp. no noise at all in the normal speakers. If i take the rca cables out of the radio and just leave them in the amp, I can hear a low sound coming from the subs just from touching the other end of the rca cables, ive tried 3 different rca cables thinking that may be the problem, and its the same with all. Ive taken my ground from where its always been, cleaned it up and put it back since it worked forever in the same spot, and that didnt fix it. I followed my power wire to the battery looking for any cuts or anything and it was fine, even cleaned the end at the battery. took the dvd player out of the dash looking for problems and havent found any. for the time, i just have my amp on my backseat, rca cables running from the radio straight back to the amp on the seat. my power and remote amp wires ran on the right side (side of the battery) back to the amp, and my ground cable just a couple feet to the left of the jeep. Any answers to what may be causing this would be really helpfull. thanks in advance. I miss my bass :(

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  • 3 more comments 
  • militaryguy_ Apr 20, 2009

    I'll check this out tomorrow morning, but this amp doesnt have any fuses. (I would think so but) Should I unplug the power/ground too from the amp before doing this testing?

  • militaryguy_ Apr 20, 2009

    Ok, this seems to be the problem, but I dont really know how to check/fix the connection between the shield and the board. Could you tell me how, or give me steps please? Sorry, I dont know much more then hooking them up lol.

  • militaryguy_ Apr 20, 2009

    nevermind, turns out this isnt the problem. used another pair of testers and said 0.

  • Perry Babin May 11, 2010

    You should have a fuse in the wire from the battery. Remove it so the power source is disconnected from the amp.

  • Perry Babin May 11, 2010

    It sounds like you may have an open shield connection on the amplifier's RCA jacks. Remove the main power fuse before removing the cover from the amp.

    To check the shield ground on these amplifiers, touch one of the meter probes to the shield of each vertical set of connectors and push back. If there is ~0 ohms between the two shields when pushing back, the ground connection is OK. If there is more than 1 ohm of resistance, you need to check the connection between the shield and the board.



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Is it ok to ground my car amps directly to the ground post of my battery? Seems like it would be because the battery ground is about 10 in. away.

Posted on Aug 01, 2009

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Sounds like you have a bad ground going to your rca's. try running a wire from ground to the shield of your rcas and see if the noise goes away.

Posted on May 08, 2009


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