The YM5104AC Marimba features graduated rosewood bars that produce a traditional sound and an even projection throughout the instrument's range. Yamaha’s exclusive tuning method that ensures true pitch and full sound. Cut-away designed resonators have a 3-position tracking system that allows resonator height adjustment for pitch and tone control and also provides additional strength while reducing overall instrument weight. These nut/bolt and welded resonators are made with denser alloys and thicker walls maximize the tone and ensure rattle-free play. A height adjustable frame has pneumatic struts that allow one person to easily place the instrument in a comfortable playing position. Hinged resonators and rails, along with a two-piece crossbar, make tear down a simple task. Oversized 4" casters allow for easy transport over rough surfaces. Thanks to years of research and development with top artists – covering tuning, bar design and frame construction – Yamaha boasts the most sought-after marimbas in the world.