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<DIV><FONT size=2>Do you tune the rear duplex by its proportional length,
geometrically -- i.e. move the little Monopoly house so that the length of
the rear duplex is exactly half of the speaking length -- or do you account for
inharmonicity, and tune the rear duplex to the exact frequency of the second
partial of the speaking length?</FONT></DIV>
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<DIV><FONT size=2>--Cy--</FONT></DIV>
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