This vintage TX816 is fully functional and in great condition. New batteries just installed.
The TX816 (x8 modules) is a monster of DX and FM digital synthesis. It is a unique system in that it is a rack unit that holds up to eight TF1 modules. Each TF1 module is a complete DX7 engine with 6 operators, 16 voices, and the bare minimum of front panel controls. Designed for use with external hardware and software controllers for maximum polyphony and multitimbrality. Control all 8 from a common MIDI input or each module's individual midi input in the rear. Features balanced outputs per module.