The Yamaha C3X is a direct result of the grand piano design revolution that Yamaha initiated with its CFX concert grand piano. The "x" series features changes in design of the rim, the soundboard, bridge placement, rib placement and design, hammers, and cabinet. It is essentially a different piano than a C3, and the 6'1" C3X features a warmer tone and more responsive keyboard action while maintaining a wonderful sparkle in the sound. For more information, visit http://www.cunninghampiano.com/yamaha-c3x/