Check the listing for details. Yamaha MONTAGE M8x 88-Key Synthesizer With Polyphonic Aftertouch. Condition: New. Listed at 4499.99 USD. The Yamaha Montage M8x 88-key flagship synthesizer redefines creativity with advanced sound engines, polyphonic aftertouch, and seamless studio connectivity. Designed for professional musicians and sound designers, it combines cutting-edge FM synthesis, analog warmth, and realistic instrument modeling into one powerful workstation. With 400-note polyphony and Yamaha's Motion Control engine, this synthesizer enables dynamic layering and expressive control for unparalleled sound creation. Its weighted-action keybed delivers piano-level response, while an intuitive interface streamlines your workflow. Whether you're crafting cinematic soundscapes, creating chart-ready tracks, or performing live, this synth provides the tools to elevate your music.