Subwoofer Problem... - Ranger-Forums - The Ultimate Ford Ranger Resource


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Old 02-23-2005
rngprerunner's Avatar
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Subwoofer Problem...

My sub has been doing this wierd thing latley. Between songs it will go "thump", or if I change tracks it with go "thud..thump". It only does it with burnt CD's and more so with MP3's. With an MP3 CD it will do it EVERY time. So whats going on? Is it the way the CD is burned, the CD its self, interferance somewhere, or is my sub taking a crap? Anybody else get this? Thanks!
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Old 02-23-2005
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Sounds like something happening in your HU and being sent to the sub to me. The sub itself wouldn't care about what type of media or whatever. But the HU may be switching to a different hardware decoder internally and be having DC offset problems. When switching occurs of audio signals with different DC levels riding on them, it makes a click or, in the case of a sub, a thump.
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Old 02-24-2005
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sounds like its interference with the mp3s and the way its been burnt.

sometimes thought it is caused by a ground issue and feedback or something to that effect.
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Old 02-24-2005
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That makes sense, Kiel, about the MP3 decoder being the source of the thump if the disc is wierdly coded.

I don't know about the ground issue though -- I can't see how it would thump if the HU is already on, just by chaning modes on the HU.
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Old 02-26-2005
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on the back of your head unit where you have the rcas plugged up you need to get a filter you should be able to get it at a sound store maybe even circuit city.
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Old 02-26-2005
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Mine used to do that alot too, like when I would start the truck and while it was playing music. Doesn't do it anymore without any subs, but it probably will again when I get a new system.
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