Fender 1970 guitar and bass catalog. Page 58. Details of the Fender Super Bassman I and II bass amplifiers.
The Super Bassman was a 100w, 7 tube amplifier; two channels, each with its own volume, treble and bass control. It powered either one or two 2x15" cabinets; equipped with either Fender or JBL D-140 speaker cones.
1970 pricing was as follows:
SBI (Fender speakers) $835
SBI (JBL speakers) $980
SBII (Fender speakers) $1215
SBII (JBL speakers) $1510
Two exceptional performers with the famous Fender sound