I put together the attached Excel spreadsheet where you can calculate either the voltage output with the desired watts and speaker impedance or to determine the current watts given the DMM AC voltage and speaker impedance.
Simply enter the values in the yellow cells and the results will display in the green cells. I hope this helps someone who may be confused with the worded instructions available.
To use this you need to use a Digital Multi Meter (DMM) set to AV voltage setting and hook it up to your amps speaker output.
DMM_settings.zip
