The best digital piano is one that can grow with a musician as they progress. When a pianist's skill level rises, they require a keyboard action built for more serious playing. The Arius YDP-163 features Graded Hammer 3 keyboard action with three sensors and synthetic ivory keytops, giving the performer a tactile surface with a response reminiscent of some of the finest pianos throughout history. The Pure CF Engine on the YDP-163 more expressively delivers the Yamaha CFIIIS concert grand piano tone for the more experienced player with a more powerful 20W stereo amplifier. With 192 note polyphony, many of the most complex piano compositions can be played without any dropped notes, and the sustained notes ring through faithfully. The YDP-163 has all of the conveniences of an electric piano without sacrificing the performance of an acoustic piano.