Donald James Leslie, inventor and manufacturer of the Leslie speaker, which helped popularize the Hammond organ and contributed to the development of electronic music, has died. He was 93.

Donald Leslie, 93, Speaker Inventor. This article is from the archive of The New York Sun before the launch of its new website in 2022. ... Leslie and Laurens Hammond, who engineered the Hammond organ ...

Donald James Leslie, who created and manufactured a speaker that refined the sound of the Hammond organ and others and helped popularize electronic music, has died. He was 93.Mr. Leslie died Sept. … ...