The musical instrument pickups, effects units and amplifiers designed and manufactured
by Harry DeArmond and Bud Rowe and later by Steve Tosh in Toledo, Ohio, from the 1940s to the 1980s, through Rowe Industries Inc.,
H. N. Rowe & Company, Rowe DeArmond Inc., DeArmond Inc. and Tosh Electronics, all of Toledo, Ohio, USA.
The Fred Gretsch Mfg. Co. was the first high-profile manufacturer to fit DeArmond pickups to their instruments when in 1950 they fitted the Model 2000 in all of their electric models. They used gold-plated and chrome-plated versions with black coil formers. Gretsch literature referred to them as Dynasonic Fidela-Tone pickups. this name was never used by DeArmond. Gretsch's successful association with DeArmond ended only after DeArmond signed an agreement with The Chicago Musical Instrument Company (CMI), manufacturers of Harmony and many other brands, to supply them with pickups.
Gretsch also manufactured a number of archtop guitars under the Bacon Belmont name fitted with Model 2000 pickups.
In the mid 1950s, Gretsch produced a small quantity of solid-bodied Electric Tenor guitars based on the Duo Jet 6128, each fitted with two four-pole versions of the Model 2000 pickup in chrome with black coil formers, as seen here (photo copyright Tommy Tucciarone)