The XK- System is a revolutionary new keyboard concept. It is the only keyboard product on the market today in which a single-manual organ (XK-3/XK-3c) can be converted to a double-manual organ without any modifications . The XK-3/XK-3c can be quickly installed or removed from the lower manual cabinet assembly without any tools or technical experience. It is housed in a beautiful all wood “B-3” style cabinet. The Pedalboard and Matching bench complete the system.