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      09-30-2012, 11:07 AM   #90
kaigoss69
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Drives: '08 335i
Join Date: Jul 2008
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Quote:
Originally Posted by AWBimmer View Post
I've secured the 12w7 but need to pay n pick up however were not able to test it as neither of us have an amp or w/e to test it so a little hesitant to drop 250 for something I've not seen work...
You can use a voltmeter set to measure resistance (at the lowest setting) and measure between the + and - terminals. If it does not give you a reading then the voice coil is blown. If it does, the voice coil is fine, as long as the reading is close to the specified DC resistance. You can also push the cone in evenly, using all 5 fingers, listening for any rubbing noises.

Anyway, it's hard to blow a W7 so I wouldn't sweat it too much.
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