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Direct Radiator Loudspeaker System Analysis

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The low-frequency performance of direct-radiator loudspeaker systems can be accurately specified and is quantitatively related to the basic parameters of the system components. These systems function at low frequencies as low-efficiency electroacoustic high-pass filters; the frequency-dependent behavior is described by rational polynomial functions whose coefficients contain basic component parameters. These basic parameters, which are simple to evaluate, determine the system low-frequency response, efficiency, and power ratings.

JAES Volume 20 Issue 5 pp. 383-395; June 1972
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AES - Audio Engineering Society