Product specifications:
in: XLR (mic/line) X 2, phone plug (mic/line) X 2, aux 1 & 2, return(L/R) 1 & 2, out: phone plug x 4 423x104x381mm
Features: ATRAC 3.5 Uses MD Data discs. Each channel has: Trim pot, Line/Mic selector, Aux -10 to 10 pot, high, mid, and low eq pots, assign push buttons, one for chans 1&2, 2nd for 3&4, a stereo pan pot, a trim fader from 0 to 10. There's also a 5&6 vertical column with all of the above single channel stuff, plus some extras, and a "Master" vertical row. Inputs are XLR for channels 1&2, 1/4" for the rest (prototype had 1/4" for all inputs), plus 2 for AUX, outputs look like 4 X 1/4" for Disc1 to Disk4, two stereo inputs for return1 and return2. On the back there are MIDI in, out, thru connectors for MTC and MMC. The deck can be controlled with MIDI sequencer software. To the right of the Sony, there is an electronic display, power on switch, top, left, right, play, and stop buttons, and red record button, plus about 20 white buttons for record channel select (1-4), 8 locate buttons, then there's a jog/shuttle wheel. Has digital copy (bypassing ATRAC codec) between tracks. Can bounce 4 tracks down into 1 or 2 on the fly.

I have the original manual.Available for $250 or best offer. Please email if you are interested. Thanks.

http://www.minidisc.org/part_Sony_MDM-X4.html

http://www.harmony-central.com/Events/SNAMM96/Other/MDM-X4.html