|Download the class files and an html wrapper to run the applet off-line, right here: spkr.zip (37.5 KB).|
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If you need to convert imperial units to metric (some manufacturers quote Vas, Sd and Xmax in imperial units), then this may be of use.
If you don't know 'No' the reference efficiency, just guess from 2-4 %
If you don't know 'Pe', the continuous power rating for the speaker should be used.