edwardm Posted November 9, 2010 Share Posted November 9, 2010 Got a small amount of interference relative to the revs of the engine.I assume this is a grounding problem. Someone told me one of my cables may be going to ground where it shouldn't, although i'm sure they're ALL well insulated.Could i have a bad ground? Or an RCA lead too close to power/ground?Thanks Link to comment Share on other sites More sharing options...
johngreen537 Posted November 9, 2010 Share Posted November 9, 2010 Or more likey a amplified speaker wire too close to a decent power cable! Link to comment Share on other sites More sharing options...
dr_broon Posted November 9, 2010 Share Posted November 9, 2010 does it just happen on radio and not other sources?I had that, but haven't had it since putting new earthing cables on Link to comment Share on other sites More sharing options...
ryan.. Posted November 10, 2010 Share Posted November 10, 2010 Or more likey a amplified speaker wire too close to a decent power cable! will never happenIts most likely that you have not got a very good earth for your amp. Because of this the amp has used the RCA's as an earth and the signal has gone into the headunit and blown part of the rca circuit causing the interferenceWhat are you using for the earth?Make sure its not painted metal, this will be usless as an earth Link to comment Share on other sites More sharing options...
johngreen537 Posted November 10, 2010 Share Posted November 10, 2010 Or more likey a amplified speaker wire too close to a decent power cable! will never happenIts most likely that you have not got a very good earth for your amp. Because of this the amp has used the RCA's as an earth and the signal has gone into the headunit and blown part of the rca circuit causing the interferenceWhat are you using for the earth?Make sure its not painted metal, this will be usless as an earthlol. It happened to me Ran my power cables too close to the speaker wires and... lovely high pitched screamer. Link to comment Share on other sites More sharing options...
ryan.. Posted November 10, 2010 Share Posted November 10, 2010 i currently run speaker cables next to a run of 0awg cable and guess what...no noise I've been fitting systems into my cars for the last 7 years and have never had problems with running speaker cable next to power cable Link to comment Share on other sites More sharing options...
dr_broon Posted November 10, 2010 Share Posted November 10, 2010 mine was just down to the earthing under the bonnet being past it. Link to comment Share on other sites More sharing options...
edwardm Posted November 11, 2010 Author Share Posted November 11, 2010 Well i replaced my earth strap on the engine and gearbox, but for stronger cable with newer connections. Surely this can't be the culprit.Also, i haven't touched the earth on the battery - maybe this need replacing?I get the interference on the cd player and all sources i think, it's obviously an amplifier related problem, not a cd scratched or a bad radio reception.I used somewhere by the standard, rear, drivers side speaker pod to earth the amp. It's just below the speaker i think, if you pull the carpet back, it's behind there.Thoughts? Link to comment Share on other sites More sharing options...
dr_broon Posted November 11, 2010 Share Posted November 11, 2010 ahh.. mine only happened on the radio.. just like a ticking sound in time with engine revs. Link to comment Share on other sites More sharing options...
ryan.. Posted November 11, 2010 Share Posted November 11, 2010 Well i replaced my earth strap on the engine and gearbox, but for stronger cable with newer connections. Surely this can't be the culprit.Also, i haven't touched the earth on the battery - maybe this need replacing?I get the interference on the cd player and all sources i think, it's obviously an amplifier related problem, not a cd scratched or a bad radio reception.I used somewhere by the standard, rear, drivers side speaker pod to earth the amp. It's just below the speaker i think, if you pull the carpet back, it's behind there.Thoughts?upgrading the battery earth will help your electrical system yes but it will just help with voltage drop. Remember all the electrics in the car are one system linked through the battery so the larger the cable the better the flow and the more current can flow through. Your amps earth, is it on a painted surface? If so then get rid of that paint. I used the hole in the bottom of the spare wheel well to fit a bolt, sanded the paint down to bare metal and i didnt have a problem. I currently have a battery in the boot so I run 0awg from the batteries earth to a bolt which goes through the boot floor. No water gets in as the bolt is bigger than the hole was when it was drilled and it was sealed up using underseal. Again, no interference at all Link to comment Share on other sites More sharing options...
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