A low-frequency transducer system, designated as "Servo-Drive Loudspeaker" for use below 100 Hz is described. Instead of the traditional voice coil and magnet, a low mass rotary power converter is used to supply force to the radiators. The result of this is an unprecedented power capacity, high efficiency, excellent linearity, and low distortion. Such a device used in a direct radiator or horn loaded system allows the use of a greatly reduced enclosure volume for a given acoustic output and low frequency cutoff.

Authors: Danley, Thomas J.; Rey, Charles A.; Whymark, Roy R.
Affiliation: Intersonics, Incorporated, Northbrook, IL
AES Convention: 74 (October 1983) Paper Number: 2043
Publication Date: October 1, 1983
Subject: Loudspeakers: Transducers and Low-Frequency System Alignments

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