via this auction
"Custom system [built] back in the '80s using CEM chips on PAiA boards. This synth uses banana plugs to connect the various modules. Many cords are included.

Also included is a 2 amp bipolar power supply. This is also custom built using good components and housed in an aluminum box.
The synth modules are in a standard 19" rack case. This listing does NOT include any keyboard or other controller. There is only a trigger button. A keyboard controller or sequencer with control voltage outputs will be needed unless you want to just experiment with voltages from the VCOs.
This is an item for someone who wants to tinker and experiment. I used it as a bass voice along with other synths and it worked great for that purpose. Like any modular synth there is a world of sonic possibilities."