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4 ohm subwoofer problem... Answered

I have received a 4 ohm subwoofer, that seems to be "stuck" , I don't know how I could fix this. I also need a way to test the subwoofer because I do not have an amp. Thanks

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What HAL2.0 said. Replacement cones with voice coils are available for many speakers (check with a local speaker reconer), but unless it's an exceptional quality driver, it'll probably cost more than the driver is worth. A cone should move in and out without feeling or hearing any rubbing or scratching. To check the voice coil, use a 1.5 volt battery connected to the terminals (briefly). The cone should move in or out.