Marshall JMP-1 Tube MIDI Guitar Pre-amp A big-muscled tone-sweetener that lets you dial up a fat range of MIDI-compatible options. By combining Marshall valve tone with guitar-friendly MIDI technology, the JMP-1 establishes itself as the leading edge in rack pre-amps. Four custom-voiced channels are provided: Clean 1, for warm full bodied chords; Clean 2, for the glassy edge of a JTM45 and a spectrum of bright tones; OD1, for smoldering power and the searing tones of modern metal; and OD2, for tight, focused tone and all the sustain you could ever want. The JMP-1 has MIDI in, out, and thru connections plus a mapping facility. Also features a programmable stereo effects loop and Speaker-Emulated outputs (in addition to standard outputs), including an incredibly realistic stereo emulation. Features: Four channels: two clean, two overdriven MIDI in, out, and thru Mapping facility Programmable stereo effects loop Speaker-Emulated and standard outs