The proper design of a volume expander is discussed. The problems of feedback, low distortion, linear expansion, maximum thump cancellation, and attack and decay time selection are covered in detail. The performance of an expander built using the design ideas discussed is given. The expander has 19 db of expansion and 0.5-msec attack time. The expander adds more life to music and makes more pleasant listening.

Author: Matthys, R. J.
Affiliation: Minneapolis-Honeywell Regulator Company, Minneapolis, MN
JAES Volume 8 Issue 3 pp. 199-205; July 1960
Publication Date: July 1, 1960

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