Korpa 
At just 17 lbs., the M-Audio ProKeys 88sx digital stage piano delivers excellent sound in a package so light that you can carry it under one arm.
Its essential complement of instruments including grand piano, electric pianos, organ, and clav sound unbelievably good for an instrument in this price range. The piano's semi-weighted action also delivers the best feel you can get without the added cost and weight of hammer action.
While many digital stage pianos cram as many as 128 instruments into limited space, the ProKeys 88sx dedicates all of its memory to 7 high-quality sounds devoting extra attention to the multi-layer stereo samples of a Yamaha C7 concert grand. Piano 2 is designed to really cut through in popular music. Electric pianos are covered too, including a bright classic Yamaha DX7, a sweet Fender Rhodes, and a vintage Wurlitzer. There's also a percussive Hammond B3-and the Clavinet has "funky" totally nailed. Add on-board reverb and chorus to customize your sound.
Two stereo headphone jacks are perfect for private practice or teaching. The USB MIDI interface lets you record and playback on your Mac or PC without the installation of extra drivers.
The 88sx is also loaded with performance controls often not found on stage pianos including pitch and mod wheels plus inputs for two footswitches and an expression pedal.
If you want a pristine-sounding digital stage piano that feels great to both your fingers and your back, the ProKeys 88sx is for you.
