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400 K rule

Back in the olden days of audio, an ideal freq response could be calculated if you multiplied the low freq by the high, you'd get 400,000. For instance 20 X 20 k, 30 X 13 k... I am not sure have valid it is, but it was a general rule of thumb.

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  • 400 K rule - Ozzie 15:15:06 06/17/15 (0)
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