For your kind consideration is this vintage Yamaha TX81Z. Excellent condition and lived its live in a church rack. It comes in a compact 1U size and features 8 voice polyphony, 128 preset sounds, 32 user and lots of functions hidden behind 11 push buttons. The TX81Z features the ability to use waveforms other than just a sine wave. There are eight voices that can be split, layered and detuned. Great choice for an affordable FM synth. Enjoy!