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Old 07-15-2017, 02:36 AM   #1
Broz

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Speakers producing static?

So in my 1990 F-250 I just installed new door speakers and a stereo. Before these were all put in everything sounded fine. Now when I turn it up to high it creates distortion and static. Anyone know why? And should hooking an amp up to them instead of running them off off the stereo work?
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Old 07-15-2017, 04:20 AM   #2
Jimi77

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You might be clipping the stereo or the speakers are exceeding their mechanical limits. Another thing to look for is a poor connection in the signal path or somewhere where the signal could short to ground at higher voltage/volume, like where the speaker mounts to the sheet metal.
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Old 07-15-2017, 10:56 AM   #3
KaeZoo

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It's possible that the factory wiring in that truck used a common ground. Make sure that each speaker has its own positive and negative wire, and that the negative wires for the speakers aren't combined at any point. Modern head units aren't compatible with common ground wiring systems.

Edit: after further research, it looks like the speakers probably are not common ground in this model year. However, Ford used the same wire color for both left and right speakers, so if you didn't use an adapter harness, make sure you didn't mix up your wires.

Last edited by KaeZoo; 07-15-2017 at 01:30 PM.
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