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Message: <blockquote data-quote="helotaxi" data-source="post: 1999427" data-attributes="member: 550915"><p>The efficiency of what?  The sub or the amp?  The amp is actually lees efficient at low impedance because more current flowing through the power supply and output stage means more power lost as heat for the same power output.  The sub doesn't care one way or the other.  If you were to wire a dual 2 ohm coil sub for either a 4 ohm or 1 ohm load and apply 500W into that load, the voltage and current would be the same on each coil of the sub either way.  The same power would be applied and the sub would move the same amount.</p></blockquote><p></p>

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