- 300W, three-space rack-mount bass head unit, 14-tube chassis, preamp: 6 X 12AX7, 2 X 12AU7, power: 6 X 6550, single channel, front black control panel with white lines and blue accents (1992-99) or black with gray insert (2000-present), single input, seven black knobs (g, drive, b, m, five-position mid-range selector, t, MV), nine-band graphic equalizer with level slider control, input pad switch, mute switch, ultra lo switch, bright switch, ultra hi switch, graphic EQ on/off switch, standby switch, power switch, rear panel: polarity switch, two tube bias adjustment screws, slave out jack, power amp in, pre-amp out, XLR balanced line out and 1/4 in. unbalanced line out with level control and pre/post EQ switch, effects loop, tuner out, footswitch jack, two 1/4 in. speaker jacks with two red/black speaker connectors, black casing, 19.5 in. wide, 15.75 in. deep, 7.375 in. tall, 70 lbs., mfg. 1992-2012.

- 450W @ 4 ohms (275W @ 9 ohms), two-space rack-mount bass head unit, hybrid chassis, preamp: 3 X 12AX7, power: tube driven MOSFET, single channel, front black control panel with white lines and blue accents (1994-99) or black with gray insert (2000-present), single input, seven black knobs (g, b, m, five-position mid-range selector, t, MV, tube gain), nine-band graphic equalizer with level slider control, input pad switch, bright switch, ultra hi switch, ultra lo switch, mute switch, graphic EQ on/off switch, power switch, rear panel: convenience outlet, two 1/4 in. speaker jacks with two red/black speaker connectors, XLR balanced line out and 1/4 in. unbalanced line out with level control and pre/post EQ switch, power amp in, pre-amp out, effects loop, tuner out, footswitch jack, black casing, 19.5 in. wide, 16.5 in. deep, 5.25 in. tall, mfg. 1994-present.

- 1600W @ 4 ohms mono (1200W @ 8 ohms mono, 2 X 900W @ 2 ohms stereo, 2 X 625W @ 4 ohms stereo, or 2 X 350W @ 9 ohms stereo), two-space rack-mount bass head-unit, hybrid chassis, preamp: 3 X 12AX7, power: tube driven MOSFET, single channel, front black control panel (1997-99) or black and gray control panel (1999-present), ten black knobs (g, compression, b, m, five-position mid-range freq. selector, t, line out level, MV, crossover freq., crossover balance), nine-band graphic EQ with level slider control, mute switch, input pad switch, ultra high switch, ultra low switch, bright switch, graphic EQ on/off switch, effects bypass switch, limit defeat switch, power switch, rear panel: convenience outlet, bi-amp high and low outputs, two XLR balanced line outs and two unbalanced 1/4 in. line outs (one per channel each) with stereo/mono and pre/post EQ switches, effects loop with two returns (one per channel), tuner out, four 1/4 in. speaker jacks, and two sets of red/black speaker connectors, stereo/mono power amp switch, two power amp inputs and two preamp outputs (one per channel each), two footswitch jacks, black casing, 19 in. wide, 3.5 in. tall, 15.5 in. deep, 42 lbs., mfg. 1997-present.

- 1000W @ 4 ohms mono (680W @ 8 ohms mono, 2 X 500W @ 2 ohms stereo, 2 X 340W @ 4 ohms stereo, or 2 X 255W @ 8 ohms stereo), three-space bass rack-mount head-unit, hybrid chassis with 1 X 12AX7 preamp tube, MOSFET power amp, two channels, front black and gray control panel, single input, 15 black knobs (Clean Ch.: g, b, m, t, v, octave, OD Ch.: g, b, m, mid-range freq., t, v, All: MV, crossover freq., crossover balance), mute switch, input pad switch, ultra high switch, ultra low switch, bright switch, compression switch, combine switch, channel switch, limit defeat switch, OD Ch. boost switch, OD Ch. gate switch, power switch, rear panel: convenience outlet, bi-amp high and low outputs, two XLR balanced line outs with clean pre/post switch and OD/mix switches, two effects loops (one per channel), tuner out, three Speakon jacks, four 1/4 in. speaker jacks, full range/biamp switch, stereo/mono power amp switch, two power amp inputs (one per channel)and three preamp outputs (OD, Clean/Mix, Octave), clean/mix separate switch, two footswitch jacks, black casing, 19 in. wide, 5.75 in. tall, 15.5 in. deep, mfg. 2002-05.

- 1100W @ 4 ohms (750W @ 8 ohms), two-space bass rack-mount head unit, hybrid chassis, preamp: 4 X 12AX7, 2 X 12AU7, power: MOSFET, single channel, front black and gray control panel, single input, 14 black knobs (compression, g, b, four semi-parametric mid tone controls each with a freq. selector, t, tube volume, MV), input pad switch, mute switch, ultra lo switch, ultra hi switch, bright switch, power switch, rear panel: convenience outlet, one Speakon and two 1/4 in. speaker jacks, XLR balanced line out with level control and pre/post switch, unbalanced 1/4 in. line out, tuner out, power amp in, pre-amp out, effects loop, footswitch jack, black casing, 19 in. wide, 3.5 in. tall, 15 in. deep, 41 lbs., mfg. 2005-09.

- 600W @ 8 ohms (1000W @ 4 ohms), bass head, one-space rack mount, hybrid chassis, preamp: 1 X JJ 12AX7, power: solid-state Class D, single channel, dark gray front control panel, single input, eight black knobs (compression, g, b, m, five-position mid-freq., t, FX mix, MV), mute switch, -15dB switch, ultra hi switch, ultra lo switch, power switch, headphone jack, rear panel: footswitch jack, power amp in, preamp out, effects loop, tuner out, two Speakon speaker jacks, tube direct XLR output, post/pre EQ switch, 0dB/-40dB switch, ground/lift switch, RCA aux. inputs, black casing, removable rack ears, 15.5 lbs., mfg. 2010-present.

- 800W @ 8 ohms (1300W @ 4 ohms, 2500W @ 2 ohms), bass head, one-space rack mount, hybrid chassis, preamp: 2 X 12AX7, 1 X 12AU7 (2010-present) or 2 X 12AU7 (2006-08), power: solid-state Class D, single channel, dark gray front control panel, single input, 10 black knobs (g, five-position ultra low, b, m, five-position mid-freq., t, drive with pull on switch, power, MV), mute switch, -12dB switch, ultra hi switch, bright switch, power switch, rear panel: balanced XLR line out, pre/post EQ switch, ground/lift switch, tuner out, power amp in, preamp out, effects loop, footswitch jack, two Speakon speaker jacks, black casing, 23 lbs., mfg. 2006-08, 2010-2012.

- 400W, 1-15 in. speaker, 1 in. horn with variable level attenuator, 8 ohm impedance, Bass reflex cabinet design, Baltic birch plywood construction, multi-coat urethane polymer finish/sealant, black metal grille, side handles, 99 lbs., disc. 2001.

- 300W, 2-10 in. speakers, 1 in. horn with variable level attenuator, 8 ohm impedance, Bass reflex cabinet design, Baltic birch plywood construction, multi-coat urethane polymer finish/sealant, black metal grille, side handles, 84 lbs., disc. 2000.

- 400W, 2-12 in. speakers, 1 in. horn with variable level attenuator, 8 ohm impedance, Bass reflex cabinet design, Baltic birch plywood construction, multi-coat urethane polymer finish/sealant, black metal grille, side handles, 110 lbs., disc. 2000.

- 600W, 4-10 in. speakers, 1 in. horn with variable level attenuator, 8 ohm impedance, Bass reflex cabinet design, Baltic birch plywood construction, multi-coat urethane polymer finish/sealant, black metal grille, side handles, 118 lbs., disc. 2001.

- similar to the PR-410H Speaker Cabinet, except has a extended low end design and 4 ohm impedance, 128 lbs., disc. 2006.

- 1200W, 8-10 in. speakers, 2-1 in. horns with variable level attenuator, 8 ohm impedance, Bass reflex cabinet design with four separate cabinet compartments, Baltic birch plywood construction, multi-coat urethane polymer finish/sealant, black metal grille, side handles, 212 lbs., disc. 2003.