This is the rack version of the Roland Super JX-10

The Roland Super JX-10 is a 12-voice analog synthesizer released in 1986 and was the last full analog synthesizer they manufactured. An updated take on it's predecessor the JX-8P, the JX-10 features a full 76 keyboard with velocity and aftertouch, two DCO's (Digitally controlled oscillators) per voice, a resonant 24/dB analog filter, and a digital LCD screen with complex programmability and storage. Like the JX-8P, the JX-10 utilizes the PG-800 programmer for expanded knob tweaking and programmability. The JX-10 was also released as a rack version known as the MKS-70.