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10-01-2009, 12:49 AM
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Audio Junky
Drives: 08 liftback Join Date: Oct 2008
Location: Spokane, Wa
Posts: 1,412
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well.... with the voice coil thing you wont be able to see anything wrong... the only thing is that if you push on the cone you might hear a scratching noise.
Sometimes you can hook up a multimeter to a speaker and check its resistance (ohm load) and it'll show a wierd value.... thats a clue to a voice coil going bad... but doesn't always happen. a 4ohm speaker should read around 3.2-3.6ohms normally (DC resistance is always a lil lower than AC).
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