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Amplitude Control of Loudspeaker Cone Motion in the Resonance Frequency Range

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Cone loudspeakers exhibit a peak impedance at their resonant frequency, resulting in poor power transfer and high distortion in this frequency range. The development and performance of a new speaker with integral, non-electrical means for minimizing this impedance peak, without dependency upon associated enclosures, is described. Electro-acoustic efficiency at all frequencies above the resonance range is not adversely affected.

JAES Volume 9 Issue 4 pp. 260-263; October 1961
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AES - Audio Engineering Society