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Impedance Analysis of Subwoofer Systems

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The electrical impedance of four low-frequency loudspeaker systems is analyzed. The expression for this impedance is obtained directly from the acoustical analogous circuit. Formulas are derived for calculating the small-signal parameters from the frequencies of impedance minima and maxima of two fourth-order and two sixth-order systems. Results of measurements are presented for two sixth-order systems.

JAES Volume 42 Issue 1/2 pp. 4-14; February 1994
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AES - Audio Engineering Society