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Message: <blockquote data-quote="thch" data-source="post: 1290355" data-attributes="member: 562032">pretty much.  Vin * Iin = Vout * Iout of the POWER SUPPLY.  most amp manufacturer's fix the Vout at a certain value so the amp can run to full power.  some amp called "class H" amplifiers change Vout according to the music being played.  some amps like JL RIPS and some PG amps will sense the speakers attached and adjust the value of Vout to allow equal power at any speaker impedance.you're way of invisioning the amp is a bit simplified.  in some ways it is correct.  as gain increaes and power output increases, the amp draws more current, thus the resistance effectively seen from the battery decreases.  but in terms of actual audio amplification, well, not really correct.for a better discription of an amp, you need to look at transistors and opamps.</blockquote>

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