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In Reply to: RE: First Watts and high output amps posted by Caucasian Blackplate on April 16, 2014 at 14:49:01
I did something similar a couple of days ago when I needed to ensure two amps were at the exact same level. I used Stereophile test disk #2 track 1 in my CD player to generate a 1kHz tone and set the volume control on the amps to a typical (loud) listening level on my Altec A7 speakers. I then measured the output from the amps to make them exactly the same using a DVM. I chose 100mV as the level as it was not only a nice round number but coincided with the volume level at which I normally listen (based upon the position of the volume control). So that's .1V squared / 16 = .000625W!
BTW: these were SE 2A3 amps putting out almost 3W.
Follow Ups:
It's very important to remember that most meters are made to measure 60Hz, and frequencies far away from 60Hz will yield inaccurate measurements.
The Fluke 175 manual asserts 2% accuracy to 1kHz.
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