- 300W, bass head-unit, tube chassis, preamp: 2 X 12AX7, power: 6 X 6550, two channels, compression, front black control panel, single input, eleven black knobs, 10-band graphic equalizer, black covering, black metal grille, 75 lbs., mfg. 2002-2012.

- preamp only, tube chassis, preamp: 2 X 12AX7, two channels, front silver control panel, single input, 11 black knobs (Ch. 1: v, b, m, t, Ch. 2: g, v, blend, Vari Q: freq, level, room balance, MV), rear panel: footswitch jack, active crossover with balance and freq controls, main output, line out with level control, effects loop with trim level, tuner out, optional input jack, black casing, 13 lbs., mfg. 2005-disc.