"Lawrence Sound Research" or "LSR"

-Started business in 1975-76 by Bill Lawrence(Willi Lorenz Stich)

-It was in this time period that Bill Lawrence(Willi Lorenz Stich) created the L-90,L-500, L-510, L-250 and others.

-Jzchak 'EZ' Wajcman became involved with LSR in 1982, having previously partnered with Bill Lawrence(Willi Lorenz Stich) at Lawrence Electro-sound in the sixties.

-closed its doors in 1984

See the http://billlawrencereview.com/BillLawrence_Timeline page for more details.