Roger Bobo's Signature Series Solo model features a clear, focused tone that sings and projects. Especially suitable for solo performances and for use with F and Eb tubas. Gold-plated rim and cup.Roger Bobo has had tenures as pricipal tuba of the Rochester Philharmonic, Concertgebouw, and Los Angeles Philharmonic orchestras. In 1961, he became the first in history to play a tuba recital at Carnegie Hall. Many leading contemporary composers have written pieces for him and he has inpired audiences around the world with his warm musicality and natural presence.Yamaha's Signature Series mouthpieces come after year of collaborating with hundreds of the world's best players at their R&D Ateliers. These players were unsatisfied with the commercial models out there and knew the Yamaha technicians would deliver exactly the tone and response they wanted. The demand for these mouthpieces has grown, so Yamaha decided to offer a select lineup of these mouthpieces. Each Signature Series mouthpiece is produced on a precise, computer-controlled lathe to guarantee each one is exactly the same as the one used by its namesake.