The marimba one Soloist™ is built using traditional mortise and tenon joinery. The joints are locked together using Rosewood pegs. All of our Soloist frame marimbas feature custom playing height. Just tell us how tall you are and we will recommend a keyboard height for you. Each of our Soloist marimbas are works of art. They are built to last through generations of musicians. 100% designed and built in our California factory.