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Originally Posted by Tim Snyder  So which is it? Does the KM-81 actually go to 20 HZ as listed or 40 HZ as the plot suggests? |
Yes with a gradual roll off.
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Or are we to use the graph and draw the rest of the line ourselves following the previous information?
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Yes. An electromechanical device never drop like a brickwall such a digital filter can do.
A mic or speaker that is truly flat to 40Hz will have significant pickup/output at 20Hz.
/Peter