Appendix 3

Crossover and Loudspeaker Articles in Wireless World/Electronics World

These patents concentrate on both active and passive crossover design,

Crossovers

Anon

Motional Feedback Loudspeaker

September 1973

p. 425

D. C. Read

Active Filter Crossover Networks

December 1973

p. 574

H. D. Harwood

Motional Feedback in Loudspeakers

March 1974

p. 51

D. C. Read

Active Crossover Networks

November 1974

p. 443

David Read

More on Active Crossover Networks

April 1981

p. 41

Jeff Macaulay

20 Hz Sub-woofer

August 1995

p. 636

Russel Breden

Roaring Subwoofer

February 1997

p. 104

Bill Hardman

Precise Active Crossover

August 1999

p. 652

Christof Heinzerling

Adaptable Active Speaker Design

February 2000

p. 105

Jeff Macaulay

Tying the Knot—MFB ...

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