- 55W, 2-15 in. speakers in a separate cabinet, piggyback guitar configuration, six-tube chassis: preamp: 2 X 12AX7, 1 X 7199, power: 2 X 7027A, rectifier: 5AR4, two channels, front silver control panel, four inputs (two per channel with one each for bright and normal), six black knobs (Ch 1: v, t, b, Ch 2: v, t, b), ultra high and ultra low switches for each channel, power switch, black covering, blue/gray grille, mfg. 1969 only.

- similar to the B-25, except designed for bass guitars with heavier duty speakers, mfg. 1969-1980.

- 55W, 2-12 in. speakers, guitar combo, nine tube chassis, pre-amp: 4 X 12AX7, 1 X 6CG7, 1 X 7199, power: 2 X 7027A, rectifier: 5AR4, single channel, reverb, vibrato, front control panel, four inputs (two per channel, and one each for bright and normal), nine knobs (v, t, b, Ultra high, Ultra Lo, tremolo, vibrato, reverb, afterbeat) black covering, blue/gray grille, mfg. 1969-1971.

- similar to the B-22X Jupiter 22, except in piggyback configuration with a 4-12 in. speaker cabinet, mfg. 1969-1970.