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Nice

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  1. Coil heat is power compression, not impedance rise.

    Impedance rise is caused by the varying current created by moving a coil through a magnetic field. When you do this it induces a current through the coil (basically like your alternator) which opposes the current driving the sub.

    It varies by frequency depending on the box and driver.

    So the heating of a coil will not cause a rise?

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