Yamaha Tuba Mouthpiece "Signature Series"Roger Bobo Solo : The Solo mouthpiece features a clear focused tone that sings and projects, and is especially suitable for solo performances and for use with F and Eb tubas. Roger Bobo Symphonic : The Symphonic model is characterized by a warm tone, big enough to fill the concert with rich colorful sound. Jim Self : Jim's mouthpiece embodies his long experience of playing literally all types of music in highly demanding situations. Sergio Carolino :