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| Radio or speaker?; Static | |
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| Tweet Topic Started: Aug 6 2014, 08:17 PM (616 Views) | |
| Memphis metro | Aug 6 2014, 08:17 PM Post #1 |
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I have installed a few radios and a few speakers in my time but never enough to make me a expert on the subject. Heres the question. Static sound usually the result of a shot speaker or shot radio? I assume the speaker. |
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| Coche Blanco | Aug 6 2014, 08:19 PM Post #2 |
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Troll Certified
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Pure static? I see no reason why it would be the speaker. |
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| Memphis metro | Aug 6 2014, 08:21 PM Post #3 |
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Half music and half static. Front speakers sound fine. Only rear. One worse than other. |
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| 3cyltom | Aug 6 2014, 09:35 PM Post #4 |
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Sounds absolutely insane, but my response is a bad alternator. I have been chasing the same noise in mine. I finally fixed it with a new (used) alternator. I changed speakers and wires to no avail. One day the alternator started acting funny, I changed it, and presto no stereo static noise. |
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| t3ragtop | Aug 6 2014, 09:39 PM Post #5 |
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Turbo3 and Twincam Tweaker
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the speakers they used in metros had paper cones. the paper dries out and disintegrates. there's a flexible surround that attaches the cone to the frame. that's made from foam and those rot out, too. when the cone and surround let go what's left of the cone flaps around, out of control, and that will buzz like mad. the inner part of the cone is attached to the voice coil, a coil of magnetic wire that moves back and forth within the magnet to move the cone. the voice coil is attached to the speaker frame with a bit of cloth called a spider. the spider and the cone surround hold the cone, suspended in place. when the material deteriorate there's nothing left to maintain the mechanical position of the voice so it shifts and drags on the magnet. that causes a scratching sound. i'd say that there's more chance of a bad speaker (or speakers) than a problem with the electronics. usually when electronics go tits up they just stop working altogether.
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| Memphis metro | Aug 6 2014, 10:00 PM Post #6 |
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That has been my experience too. I have always wondered if a poor radio would create poor sound at speakers. Radio is usually dead or it works. As for the alternator, that sound usually increases or decreases with engine rpms I thought. |
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| 3cyltom | Aug 6 2014, 10:09 PM Post #7 |
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Not my gremlin. The only diff I noticed is when I hit large bumps. As long as it was running, there was noise. Key on engine off, no noise. And only from the back speakers. If you are feelin froggy, take the speaker out and test it on a known good radio. You can usually spot a ripped cone pretty easy. |
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| Memphis metro | Aug 6 2014, 10:19 PM Post #8 |
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I was listening to it today with the engine off and mine had static on the rears. I pulled the one out that sounded really bad and threw it on the shelf but I have not thought about trying it on something else. I might do that. It had a massive size dirt duaber nest on it. I did notice when I was unscrewing it, it seemed to change its performance but it never totally cleared up. Nothing physically looking wrong with it. |
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