This is the only true way to test. Remember that power equals volts by amps. so you will need a non-inductive test load (like a high wattage power resistor) and a true RMS digital VOM. A true RMS amp meter. A constant test signal will be required like a 1khz tone at 0db on a cd. (If you dont have a audio test cd i have a ISO i can link you to if needed). Then all you need to do is hook up the resistor to the amp output like a normal speaker but with the amp meter in seres with it. then play the tone and turn the amp up, read the voltage across the load resistor and keep turning it up untill the voltage reaches the max. read the max voltage and the current write it down. turn off equipment. multiply voltage by current to get the power output rating.
Audio is a AC (but the frequancy changes) so you need a AC amp meter and volt meter. True RMS gear is recommended to get a real reading of true power. note: some true RMS meters are only calabrated to read true RMS at 60hz! You'll get a fairly close reading though.
Vincenzio
Unregistered guest
Posted on
Thanks for the imput I'll tr that out I have a fairly sophisticated Digi Multimeter It has more functions than I know how to use Thanks again Vincenzio