- preamp only, one-space rack-mount guitar head-unit, two-tube chassis, preamp: 2 X ECC83, four channels (clean 1, clean 2, OD1, OD2), 100 programmable settings, front gold control panel, single input, output level knob, two two-digit digital displays, 16 buttons, data knob, headphone jack, parallel effects loop with a level switch, MIDI capabilities, optional footswitch, standard outputs, speaker emulated outputs, black casing, 10 lbs., disc. 2007.

- 200W (100W per side) power amp only, three-space rack-mount guitar head-unit, 12 tube chassis, predrives: 2 X ECC83, phase inverters: 2 X ECC81, power: 8 X EL34, two channels, front gold control panel with the controls mounted in the middle facing upwards, four knobs (Ch. A: v, p, Ch. B: v, p), two voicing switches (one per channel), optional footswitch, black casing, 45 lbs., disc.