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Possibly damaged subwoofer
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<blockquote data-quote="Dubizzle" data-source="post: 8799582" data-attributes="member: 686306"><p>Thoughts and lessons learned</p><p></p><p>Although it was a bad experience, I've learned from it:</p><p></p><p>*Never buy second hand speaker without checking the voice coils impedance with digital multi meeter.</p><p></p><p>*if a speaker impedance reads 1 ohm difference lower or higher than the specs its bad and you should walk away no matter how tempting the offer is.</p><p></p><p>*The acceptable used speaker voice coil impedance differences from the factory values should not exceed 0.2 ohm ( check my monitor audio driver picture) </p><p></p><p>* Dual voice coils speakers individual coils EACH MUST Read the factory value for each one of them.</p><p></p><p>* Regardless of whats in between a speakers voice coils and the final connection terminals ( jumper, fuse etc.. ) the readings at the terminals must read the factory spec or by margin of 0.2 ohm close to it, Because this is how the speaker is intended to be used, ( you won't go and connect your amplifier cables on the spiders and let them bounce when the bass hit would you?</p><p></p><p>Correct me if I'm wrong guys.</p></blockquote><p></p>
[QUOTE="Dubizzle, post: 8799582, member: 686306"] Thoughts and lessons learned Although it was a bad experience, I've learned from it: *Never buy second hand speaker without checking the voice coils impedance with digital multi meeter. *if a speaker impedance reads 1 ohm difference lower or higher than the specs its bad and you should walk away no matter how tempting the offer is. *The acceptable used speaker voice coil impedance differences from the factory values should not exceed 0.2 ohm ( check my monitor audio driver picture) * Dual voice coils speakers individual coils EACH MUST Read the factory value for each one of them. * Regardless of whats in between a speakers voice coils and the final connection terminals ( jumper, fuse etc.. ) the readings at the terminals must read the factory spec or by margin of 0.2 ohm close to it, Because this is how the speaker is intended to be used, ( you won't go and connect your amplifier cables on the spiders and let them bounce when the bass hit would you? Correct me if I'm wrong guys. [/QUOTE]
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