>>Depending on what the capability of the Fluke 83 is, I suppose that resistance measurements could be taken, then the various voltages, and an estimate of power arrived at by using P=V(squared)/R. We'll see.
If you're willing to treat the speaker as a constant impedence then only one of voltage or current is required. I guess the question is whether that is close enough for this purpose. The impedence varies with frequency, so depending on the content you could have power levels differing by 2:1 at the same voltage.
I guess as long as the signal is "typical music" you could measure voltage (across the speaker) and current (in line with the speaker wire) once by playing the same material twice, use those values to calculate average impedence (I'm gonna feel stupid if it's exactly "4 ohms"
) and then for the rest of the calculations use that average value plus voltage measurements.
V^^2 / 4 is sounding better and better all the time.
