Speakers Cracklin'...
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Joined: Jan 2001
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From: S. Mississippi
Speakers Cracklin'...
I've got a Blaupunkt CD Head Unit powering some old roadmaster 6x9's in my doors, the problem i'm having is that the speakers crackle when i take off, or when i push the accelerator (they play fine otherwise)..but only when the truck is in motion, i could rev it sky high and no noise.
I'm thinking its the alternator going bad and surging, but i'm not sure.
Any help is appreciated.
I'm thinking its the alternator going bad and surging, but i'm not sure.
Any help is appreciated.
Senior User
Joined: Jan 2003
Posts: 271
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From: Pennsylvania
Speakers Cracklin'...
Check your connection of the speaker in the doors. Make sure the connections are tight and that the speakers are mounted very securely. It sounds like they may be loose, causing them to vibrate in the door. Lemme know what u find.
Steve
Steve
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From: S. Mississippi
Speakers Cracklin'...
i've made sure all the connections are good and the speakers are tight.
with the engine not running and the key in the accesory position it will not do this. but with the engine running it doesn't do it either.
Only when the engine is running and under load, moving down the highway does it create this noise...and only when i'm playing cd's.
i'm stumped.
with the engine not running and the key in the accesory position it will not do this. but with the engine running it doesn't do it either.
Only when the engine is running and under load, moving down the highway does it create this noise...and only when i'm playing cd's.
i'm stumped.
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Joined: Jan 2001
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From: S. Mississippi
Speakers Cracklin'...
You are probably right, it doesn't do it all the time, just occasionally.
I'll replace the head unit within the next couple of months, but for now it jams...
I'll replace the head unit within the next couple of months, but for now it jams...
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Joined: Feb 2003
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Speakers Cracklin'...
Sounds to be a ground loop or poor ground. Do you have an after market amp, equalizer, or other device in the audio system? Who installed your after-market parts? Check your head unit ground... make sure it is secure and not hooked to another device. Also make sure you speaker wires are not near any DC voltage sources. Speakers wires is suseptible to noise induction.
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Posting Guru
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From: S. Mississippi
Speakers Cracklin'...
i installed the stereo myself... there a no aftermarket amps, eq's or anything else in the system, the speakers are powered off of the head unit itself.
The wires are pretty much isolated except for where they connect to the constant hot, switched and ground.
I do not have an extra ground lead attached to the stereo, just the ground wire running to the battery and the stereo antenna acting as a ground.
Anywhere else i should ground the stereo?
The wires are pretty much isolated except for where they connect to the constant hot, switched and ground.
I do not have an extra ground lead attached to the stereo, just the ground wire running to the battery and the stereo antenna acting as a ground.
Anywhere else i should ground the stereo?
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Joined: Feb 2003
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Speakers Cracklin'...
did you use a wiring harness or splice into existing wire? Generally you ground the black wire from the head unit to a chasis ground. Grounding through the battery could possibly cause alternator whine as RPMs increase.
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Posting Guru
Joined: Jan 2001
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From: S. Mississippi
Speakers Cracklin'...
i did the wiring myself. i got the power side correct, in that i didn't run it to the battery, but i did run the ground there, while i should have connected it to the chassis somewhere.
Thanks for pointing that out, i gotta change that in the morning!
Thanks for pointing that out, i gotta change that in the morning!
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Speakers Cracklin'...
yeah you should have factory grounding wire you can tap into that grounded the original unit, that by itself should be sufficient. i think the headunit is just malfunctioning maybe with regulating the power supply, if you have a warranty take it back and try that. you might also check your factory wiring to your speakers, it might be bad.
edit: you said you were running old roadmasters? if these speakers are in bad shape i would consider testing a new one before anything
edit: you said you were running old roadmasters? if these speakers are in bad shape i would consider testing a new one before anything
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Posting Guru
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From: S. Mississippi
Speakers Cracklin'...
well, they still play fine, and the radio has since stopped making that noise. I tapped into the radio ground from the original radio and that cured me right up.
As for the factory wiring for the speakers, i ran that all new, so i knew it would be good.
As for the factory wiring for the speakers, i ran that all new, so i knew it would be good.
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