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Old 07-25-2015, 06:10 PM   #1
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Front Speaker Doesn't Work

New Georgetown 351. The 6x9 speaker in the passenger footwell does not work. Speaker wires are connected to the speaker. I traced them all the way up into the spaghetti chaos behind the dash/Jensen head unit and lost track of them. There is an RCA plug labeled subwoofer output that comes out of the Jensen and it is connected to an RCA plug but again can't follow it all the way. I don't think I have a subwoofer anywhere. That footwell speaker is just a regular 6x9. Next step is to pull the head unit out of the dash along with all the spaghetti and trace the wires in earnest but thought I'd check in to see if anyone can provide guidance and/or has had the same problem. Thanks.
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Old 07-25-2015, 10:47 PM   #2
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In my 2014 351 it is an 8" subwoofer. It stopped working. I took apart dash and discovered factory installed ground loop isolators in the RCA lines. I bypassed it and sub worked again. So the suppressor cap had failed. You can get them for about 15$ on Amazon or get dealer to fix. After I saw the dinky amp and dinky sub I plan to up grade. One of my to do list. Custom sub box with JL 12wT4 and class d amp around 200-400 watts should work. I believe the cheap amp is the week link in the current set up with a lousy ground also.


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Old 07-26-2015, 12:06 AM   #3
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In my 2014 351 it is an 8" subwoofer. It stopped working. I took apart dash and discovered factory installed ground loop isolators in the RCA lines. I bypassed it and sub worked again. So the suppressor cap had failed. You can get them for about 15$ on Amazon or get dealer to fix. After I saw the dinky amp and dinky sub I plan to up grade. One of my to do list. Custom sub box with JL 12wT4 and class d amp around 200-400 watts should work. I believe the cheap amp is the week link in the current set up with a lousy ground also.


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Thanks GABoy. Maybe it is an 8". Sounds like I have the same set up. Probably going to see if I can get a local car stereo shop to look at it. Sounds like something they can diagnose and fix quick and easy.
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Old 07-26-2015, 03:38 AM   #4
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It my 2015 328 the speaker in the passenger well is the subwoofer. Apologies if I am stating the obvious but the subwoofer only works when the 'Loud' button on the stereo is turned on.
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Old 07-26-2015, 07:57 AM   #5
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Thanks rkulbok. Loud button didn't have any effect for me.
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Old 07-26-2015, 04:27 PM   #6
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Originally Posted by GABoy View Post
In my 2014 351 it is an 8" subwoofer. It stopped working. I took apart dash and discovered factory installed ground loop isolators in the RCA lines. I bypassed it and sub worked again. So the suppressor cap had failed. You can get them for about 15$ on Amazon or get dealer to fix. After I saw the dinky amp and dinky sub I plan to up grade. One of my to do list. Custom sub box with JL 12wT4 and class d amp around 200-400 watts should work. I believe the cheap amp is the week link in the current set up with a lousy ground also.


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Hey GABoy that was it! After work today I decided to dive in. Pulled the front console and started following wires. Sure enough that subwoofer is wired via an RCA connector to a 2channel Mini Amp mounted in the dash behind the console. But it is connected to the mini Amp with an isolator which I would have had no idea what the heck that little black plastic cylinder was if it weren't for you. So disconnected the isolator and plugged the speaker connection directly into the amp and BINGO speaker on!

Now grant you the speaker sounded like crap and the more I played with the radio it seemed to me the speaker was over modulating. Looked closley at the amp and found the adjustment knob. Dialed back the power a little bit and now the speaker sounds way less crappy. It's still a pretty sorry sounding system but at least now it all works. I hate it when things don't work.

QUESTION: Is there any harm in leaving the isolator bypassed? I started the engine and don't seem to be getting any noise in the system. Advice?

Again HUGE THANK YOU. Would never have figured it out on my own!

Jeff
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Old 07-26-2015, 05:59 PM   #7
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You will get some engine wine noise or maybe a small thumping sound occasionally depends on rpms and level output at amp. I have had mine bypassed for awhile till I upgrade. Hear some noise from time to time. But not too noticeable. Turning down the amps level knob will help.


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Old 07-26-2015, 06:04 PM   #8
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OK. I'll keep an ear out. Might just go ahead and get one from Amazon and slap it in. Thanks again.
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