The clarinetists historical reference. ,,B44 : Validated by musicians, indisputably the best. ,B45 : Same sound qualities as the B44 with a larger tip opening. Very responsive. ,B40 : With the same technical specifications as the B45, its wider tip rail offers a compact and centered sound. ,B46 : Produces a powerful sound. A favorite of jazz musicians. ,B50 : Produces a rich and velvety sound, even in the upper register.