- 427W, bass head-unit, tube chassis, preamp: ECC83s, power: 8 X KT88, single channel, front chrome control panel, two inputs (high and low), five knobs (m, b, t, g, MV), effects loop, mid shift button, bass shift button, bright switch, mute switch, pre/post switch, output level gauge, rear panel: footswitch jack, line in jack, effects loop, 4/8 ohm impedance selector, two Speakon speaker jacks, power switch standby switch, black covering, black grille, 24 in. wide, 14.25 in. tall, 11.75 in. deep, 77 lbs., mfg. 2010-disc.

- 500W, bass head-unit, hybrid chassis, preamp: ECC83s, power: AMB solid-state section, single channel, front chrome control panel, two inputs (high and low), five knobs (m, b, t, g, MV), effects loop, mid shift button, bass shift button, bright switch, mute switch, pre/post switch, output level gauge, rear panel: power switch, effects loop, two Speakon speaker jacks, red casing, 20.625 in. wide, 7.625 in. tall, 12.75 in. deep, 30.8 lbs., mfg. 2010-disc.

- similar to the 550 Spyder, except in combo configuration with 2-10 in. speakers, recessed side handles, black covering, black grille, 30.125 in. wide, 28.75 in. tall, 18.125 in. deep, 81.4 lbs., mfg. 2010-disc.

- 200W, bass head-unit, hybrid chassis with Ashdown's ABM solid-state preamp section and 6 X 6550 power tubes, single channel, front black control panel, single input, eight knobs (input level, b, m, t, valve drive, compression level, sub-harmonics level, output level), four-band graphic EQ, flat/sharp switch, passive/active input switch, valve drive switch, EQ in/out switch, compression in/out switch, sub-harmonics in/out switch, XLR direct line out with pre/post EQ switch, mute switch, tuner out, line out, input level gauge, rear panel: power switch, effects loop, one Speakon and one standard 1/4 in. speaker jacks, black covering, black grille, 24 in. wide, 14.25 in. tall, 11.75 in. deep, 72.5 lbs., mfg. 2010-disc.

- 300W, bass head-unit, hybrid chassis with Ashdown's ABM solid-state preamp section and 6 X KT88 power tubes, single channel, front black control panel, single input, eight knobs (input level, b, m, t, valve drive, compression level, sub-harmonics level, output level), four-band graphic EQ, flat/sharp switch, passive/active input switch, valve drive switch, EQ in/out switch, compression in/out switch, sub-harmonics in/out switch, XLR direct line out with pre/post EQ switch, mute switch, tuner out, line out, input level gauge, rear panel: power switch, effects loop, one Speakon and one standard 1/4 in. speaker jacks, black covering, black grille, 24 in. wide, 14.25 in. tall, 11.75 in. deep, 73.7 lbs., mfg. 2010-disc.

- 400W, bass head-unit, hybrid chassis with Ashdown's ABM solid-state preamp section and 8 X KT88 power tubes, single channel, front black control panel, single input, eight knobs (input level, b, m, t, valve drive, compression level, sub-harmonics level, output level), four-band graphic EQ, flat/sharp switch, passive/active input switch, valve drive switch, EQ in/out switch, compression in/out switch, sub-harmonics in/out switch, XLR direct line out with pre/post EQ switch, mute switch, tuner out, line out, input level gauge, rear panel: power switch, effects loop, one Speakon and one standard 1/4 in. speaker jacks, black covering, black grille, 24 in. wide, 14.25 in. tall, 11.75 in. deep, 77 lbs., mfg. 2010-present.

- 30W, bass head-unit, tube chassis, preamp: ECC82/ECC83s, single channel, front chrome control panel, two inputs (high and low), four knobs (m, b, t, v), effects loop, mid shift button, bass shift button, bright switch, mute switch, output level gauge, rear panel: power switch, one Speakon and two standard 1/4 in. speaker jacks, black covering, chrome grille, 15.75 in. wide, 8.625 in. tall, 8.875 in. deep, 30.8 lbs., mfg. 2010-disc.