Unless otherwise noted, all devices are fully functional and have received routine service (replace bypass caps & battery; clean pots, switches, key contacts; tune & scale).

Prophet 600 w/Gligli firmware upgrade    $1000

New membrane panel; Gligli firmware upgrade (increased resolution, envelope & mod options, etc).

For details, see

https://gligli.github.io/p600fw/

MultiTrak w/Tauntek upgrade     $700

Tauntek upgrade adds MIDI CC control to all parameters, plus ROM storage of patches.  Details at

http://www.tauntek.com/SCIMultitrak.htm

SixTrak w/individual output mod  $550

Six outputs for individual processing/mixing of voices in Mono mode.

Max w/Tauntek upgrade   $400

Note:  this unit has no keyboard.

Tauntek firmware upgrade solves all the orignal design flaws of this unit;  adds Unison mode, 100 user editable patches in NV RAM, ROM storage of SixTrak, MultiTrak and Max patches.  Finally becomes a useable expander module for the SixTrak & Multitrak.  Details at

http://www.tauntek.com/SCIMax.htm