OLLIE 26 Report post Posted December 22, 2009 So I've installed my tom tom iphone car kit which charges the phone and also has audio to the car stereo. It's not usable due to the whining noise that comes through the stereo. I understand that it is a ground loop problem that can easily be eliminated by putting a noise suppression device or ground loop noise isolator on the audio cable ... Can anyone suggest where I can get one locally? something like - this help is appreciated Quote Share this post Link to post Share on other sites
jochen 4 Report post Posted December 22, 2009 So I've installed my tom tom iphone car kit which charges the phone and also has audio to the car stereo. It's not usable due to the whining noise that comes through the stereo. I understand that it is a ground loop problem that can easily be eliminated by putting a noise suppression device or ground loop noise isolator on the audio cable ... Can anyone suggest where I can get one locally? something like - this help is appreciated Firstly: have all phone carkit grounds going to the same place as the stereo Even use the ground stud on the stereo for the ground - this helps prevent the ground loop in the first place Then if you still have alternator whine, a check it is a ground loop by just connecting the positive (and not shield) of the audio cable. If you still have whine, add the isolator (d*ck Smith, Jaycar, Radio Shack) And if the whine is still present after adding the isolator, check the passenger seat :-) Quote Share this post Link to post Share on other sites
camera doctor 25 Report post Posted December 22, 2009 And if the whine is still present after adding the isolator, check the passenger seat :-) Classic !!! :lol: :lol: :lol: Quote Share this post Link to post Share on other sites
BM WORLD 1283 Report post Posted December 22, 2009 also if rca (or line audio) cables are run beisde main power feed cables that can cause that noise Quote Share this post Link to post Share on other sites
OLLIE 26 Report post Posted December 22, 2009 Cheers Jochen When checking it is still a ground loop by connecting the positive of the audio, what am i looking for? Quote Share this post Link to post Share on other sites
_ethrty-Andy_ 2132 Report post Posted December 22, 2009 also if rca (or line audio) cables are run beisde main power feed cables that can cause that noise True but thats usually only on really high preformance systems. im runing 1950W worth of amplification on full tit when i want to and it doesnt do that. Cheers Jochen When checking it is still a ground loop by connecting the positive of the audio, what am i looking for? A resistance of virtually zero Quote Share this post Link to post Share on other sites
