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Message: <blockquote data-quote="KaeZoo" data-source="post: 2541512" data-attributes="member: 554753">However good your math, your numbers are suspect.If you're calculating current draw through the power wire, your equation works fine (though you'd still need to factor in the efficiency of the amplifier).  But the voltage at the speaker outputs isn't 14.4 volts.  Speaker output voltage varies with the output level; it's not the same as battery voltage.Using the OP's numbers, 2000 watts RMS into a 1-ohm load requires a speaker terminal voltage of about 45 volts.  Calculating amperage for one speaker (1000w at 45 volts) gives us a current flow of about 22 amps at maximum output.Can you imagine what the voice coils would have to look like on a speaker built to handle over 100 amps of current?</blockquote>

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