Dave Smith Instruments Mopho x4 Polyphonic SynthesizerLike New in Box! Very Nice... Never used... It’s a Polyphonic Mopho Keyboard! The Mopho x4 builds upon the same award winning voice architecture of the Mopho and Mopho Keyboard, the Mopho x4 boasts huge sound and 4 voice polyphony in an ideally sized, portable, and elegantly designed package. Use it to create huge unison basses, creamy leads, percolating sequences, and ethereal pads. 4 Times the Voice 4 Your Pleasure Each of Moph… read more