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Original Message
We Use Output Level...
Posted by Doug Schneider on February 13, 2017 at 07:19:32:
Hello,
I agree with you about power level not being appropriate. We use output level -- single speaker at 90 and 95dB (the latter if the speaker can take it), anechoically at 2 meters. This means that it's the equivalent of 96 and 101dB at 1 meter (each halving of distance increases output by 6dB).
If you consider that two speakers playing adds 3dB, that's 99 and 104dB, but that's still not factoring in room gain. So pretty darn loud.
Doug Schneider