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<blockquote data-quote="goffmj" data-source="post: 7320345" data-attributes="member: 633067">Hello all,I have a ~year old Alpine 9887 installed in my &#039;94 Oldsmobile Cutlass Supreme. Basically, my issue is that I have some sort of interference/noise in my left rear channel. No matter what I&#039;ve tried, it&#039;s always been in that channel.What I&#039;ve done:Tried a new head unit: new head unit did fine and powered all channels perfectly. (Sony unit)Tried new speaker wiring to both front and rear speakers: no change.Tried different speakers on that channel.Tried directly connecting speakers to stereo&#039;s wire harness: no change.Made sure all positives and negatives were correct: no change.Went from stock Cutlass 6 speaker setup to new 14 awg wires running to just door and rear speakers: no change.Sent head unit to United Radio to verify stereo was ok: they verified everything working correctly.What I haven&#039;t done:Tried a new wire harness to the Alpine unit: need to find one on eBay..So, if anyone has any other ideas, it would be greatly appreciated! I cannot for the life of me figure out what the issue is. I always, ALWAYS, get muffled sound in the left rear channel, no matter my configuration. My deck is currently set to Fr/Rear/Sub as far Xover goes.If you need any more information, I&#039;m happy to supply. I&#039;ve been trying to figure this out for over a year now! Please help! //content.invisioncic.com/y282845/emoticons/frown.gif.a3531fa0534503350665a1e957861287.gifEDIT: My front speakers are 4ohm 4x6 Infinity&#039;s and my rear are 6x9 2ohm Infinity&#039;s.</blockquote>

[QUOTE="goffmj, post: 7320345, member: 633067"] Hello all, I have a ~year old Alpine 9887 installed in my '94 Oldsmobile Cutlass Supreme. Basically, my issue is that I have some sort of interference/noise in my left rear channel. No matter what I've tried, it's always been in that channel. What I've done: Tried a new head unit: new head unit did fine and powered all channels perfectly. (Sony unit) Tried new speaker wiring to both front and rear speakers: no change. Tried different speakers on that channel. Tried directly connecting speakers to stereo's wire harness: no change. Made sure all positives and negatives were correct: no change. Went from stock Cutlass 6 speaker setup to new 14 awg wires running to just door and rear speakers: no change. Sent head unit to United Radio to verify stereo was ok: they verified everything working correctly. What I haven't done: Tried a new wire harness to the Alpine unit: need to find one on eBay.. So, if anyone has any other ideas, it would be greatly appreciated! I cannot for the life of me figure out what the issue is. I always, ALWAYS, get muffled sound in the left rear channel, no matter my configuration. My deck is currently set to Fr/Rear/Sub as far Xover goes. If you need any more information, I'm happy to supply. I've been trying to figure this out for over a year now! Please help! [IMG]//content.invisioncic.com/y282845/emoticons/frown.gif.a3531fa0534503350665a1e957861287.gif[/IMG] EDIT: My front speakers are 4ohm 4x6 Infinity's and my rear are 6x9 2ohm Infinity's. [/QUOTE]

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