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Car audio interference question... Help needed

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Reno5gtt Part of things Posts: 65	Car audio interference question... Help needed Reno5gtt @reno5gtt
	Aug 5, 2012 14:24:46 GMT Select Post Deselect Post Link to Post Back to Top
	Hi, I am looking for some advice please on trying to stop interference through my car stereo system since upgrade. I have recently fitted new component speakers in the front and rear of my Reanault 19 16v cabriolet comprising of 4 x 5.25 speakers with tweeters, 2 in the front doors and 2 in the rear quarters. I have fitted these with a 300w 4 channel amp. Since fitting them I have very bad interference and I can hear the noise of the distributor and static through the tweeters . Things I have checked; All earths (down to bare metal and tight, engine bay and inside car) Supressor is fitted to the coil but I don't know if it is working? All wires are seperated through the car from the battery and ground Before I fitted the amp and just had the components powered from my head unit they were fine (no interference at all) but as soon as I fitted the amp the interference started. I had a watch of this video and I did what it says and when I unplugged the RCA's like it says and the noise goes away. Are there any techniques I could possibly try to get rid of the noise before I remove the amp from the car. Please feel free to ask any questions and i'll try to answer them best I can. Your help would be very much appreciated. Thanks
	Last Edit: Aug 6, 2012 7:01:33 GMT by Reno5gtt

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borednow Part of things Posts: 421	Car audio interference question... Help needed borednow @borednow
	Aug 6, 2012 12:06:52 GMT Select Post Deselect Post Link to Post Back to Top
	Just watcched thaat video. Seems a bit odd really. When you unplug the RCA's i'd expect the noise to stop as there is no signal at all going to the Amp. Anyway. I'd suggest the easiest and cheapest thing to try to start with is to replace the RCA leads with some others. I've had faulty leads in the past. Try running them in a different route through the car as well. I've also picked up noise when I've changed the spark plug leads and HT leads as the new set weren't as well insulated. Might be worth a try. YOu can always take them back to Halfords and say they were too long /short etc Hope it helps a bit.
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brc76 RR Helper Posts: 1,107	Car audio interference question... Help needed brc76 @brc76
	Aug 6, 2012 13:03:56 GMT Select Post Deselect Post Link to Post Back to Top
	With the car running, RCA leads removed, and the amp on, if the noise goes away then it's the audio input. Reconnect the RCA leads to the amp and then remove them from the head unit, Still got the noise? it's the leads. No noise? probably the head unit is the source....


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Reno5gtt Part of things Posts: 65	Car audio interference question... Help needed Reno5gtt @reno5gtt
	Aug 6, 2012 13:52:10 GMT Select Post Deselect Post Link to Post Back to Top
	Thanks guy's i've managed to work out it's the source/input from the car to the stereo thats causing the interference. I have swapped head unit, amp, leads, route etc... to see if the noise goes away but it's still there no matter what component has been changed. I replaced my plug leads a short time ago but they were just a cheap set I picked up off Ebay they could be the problem? If it's not them then I might try changing my coil supressor. Thank you for the advice guy's


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damageandy Part of things Posts: 640	Car audio interference question... Help needed damageandy @damageandy
	Aug 6, 2012 20:21:02 GMT Select Post Deselect Post Link to Post Back to Top
	alternator suppressor?


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Reno5gtt Part of things Posts: 65	Car audio interference question... Help needed Reno5gtt @reno5gtt
	Aug 7, 2012 8:09:36 GMT Select Post Deselect Post Link to Post Back to Top
	I don't know if my car has one, Are they built into the alternator as standard? I know there is a small supressor that comes from my coil and earths to the bulk head on my car, i'm trying to get hold of one of them at the minute.


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mantaphil Part of things Posts: 154	Car audio interference question... Help needed mantaphil @mantaphil
	Aug 7, 2012 23:20:45 GMT Select Post Deselect Post Link to Post Back to Top
	i take it you have the rca leads running down one side of the car and the power cable for the amp down the other.


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Reno5gtt Part of things Posts: 65	Car audio interference question... Help needed Reno5gtt @reno5gtt
	Aug 8, 2012 13:46:16 GMT Select Post Deselect Post Link to Post Back to Top
	Yes all the wires have been seperated


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