Ohm's law

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  • 11-05-2018, 08:25 PM
    Ohm's law
    So long story short trying to use 2 10" subs from a car from my home and been having problems finding an amp for it but really my question now is what is "rms" to "watts"?
    my subs are 12vr, 2 ohm, dual voice coil, 400rms/800peak
    so why does ohms law tell me that a 12v 2ohm circuit only need 72 watts for power?