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Wrong. The standard definition of sensitivity when dealing with speaker output...

Posted by jeffreybehr (A) on February 28, 2007 at 22:23:48

In Reply to: Re: wha? posted by Matts_ on February 28, 2007 at 21:13:42:

...is its output measured 1M away, driven by a solidstate amp driven with a 1KHz sinewave. The amp is connected first to a load resistor of 8 Ohms; the input is adjusted to create an output of 2.83VAC. That does happen to be 1 Watt into the 8-Ohm load, but read on. The resistor is disconnected and the speaker is connected to the amp, and the acoustical output is measured. Note that this standard measurement of sensitivity ignores the speaker's impedance.

The older standard of efficiency is measured the same way EXCEPT...the speaker is indeed driven with 1 Watt, defined as that Voltage needed to drive 1 Watt into a load resistor equal in value to the speaker's impedance.
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