The output was 50 watts at 8 ohm into a single 12 inch speaker, with a "Tone Ring" baffle in the speaker cabinet.
During early 1960, Fender began producing the 5F6-A Bassman with Jensen P10Q speakers.
The 5E6-A Bassman model was introduced later that year and included some evolutionary improvements.
In July 1957, Fender introduced the model 5F6 Bassman.
The 5D6 was a major departure from the earlier 5B6 Fender Bassman model.
Designed by Freddie Tavares, longtime R&D man at Fender, Instead of the single 15" speaker, four 10" Jensen Alnico P10R speakers were used.with a front panel that had a rectangular grill cloth with rounded corners and looked much like a television of that era.