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Message: <blockquote data-quote="jsloan10" data-source="post: 894070" data-attributes="member: 560397">Your putting too much thought into it, forget about the houshold current thing, all amps recieve roughly 12 to 14 volts to produce power and all amps nomatter where they come from are tested using voltages found in vehicle charging systems, most stardard testing voltages are 12volts, 13.8 volts and 14.4volts, CEA uses 14,4 volts for its testing measures.So you take an amp, power it with 14.4 volts DC and connect the output to a resistive load then play a sinewave through the amp (like 60hz or 50hz) and measure the amount of AC voltage coming from the outputs on the amp and do the formula, doesn't matter where you live, the procedure is the same.Be sure to check the link that squeak9798 put up for the full explaination.</blockquote>

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