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Amplifiers
-=Measuring Amplifier Outputs Proprely=-
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<blockquote data-quote="keep_hope_alive" data-source="post: 7386069" data-attributes="member: 576029"><p>you have the equation wrong.</p><p></p><p>P = V^2 / R</p><p></p><p>measure your AC Volts, square that number, then divide by impedance.</p><p></p><p>how are you metering the output? note that when the amp is bridged, there is a signal on both wires (one is out of phase with the other). bridging doubles voltage at the speaker, based on the equation above, doubling voltage is quadrupling power.</p><p></p><p>i suspect your meter is having a problem measuring the bridged signal. instead, place the black lead on ground and measure AC voltage on each wire separately. they should be near equal. then add those voltages together and use that in the equation.</p><p></p><p>who told you to multiply by 10???</p></blockquote><p></p>
[QUOTE="keep_hope_alive, post: 7386069, member: 576029"] you have the equation wrong. P = V^2 / R measure your AC Volts, square that number, then divide by impedance. how are you metering the output? note that when the amp is bridged, there is a signal on both wires (one is out of phase with the other). bridging doubles voltage at the speaker, based on the equation above, doubling voltage is quadrupling power. i suspect your meter is having a problem measuring the bridged signal. instead, place the black lead on ground and measure AC voltage on each wire separately. they should be near equal. then add those voltages together and use that in the equation. who told you to multiply by 10??? [/QUOTE]
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-=Measuring Amplifier Outputs Proprely=-
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