Megatone large shank trombone mouthpiece in gold plate. Megatone Trombone Mouthpieces Offer Something Better To create the Megatone, Selmer started with genuine Vincent Bach mouthpiece designs, then more than doubled the outside mass. This darkens the sound and allows you to play at a higher dynamic level without distortion. Megatone slots extremely well so pitches center dependably. A slightly larger throat affords less resistance and greater flexibility. The result is a warmer, more powerful sound that's perfect in the concert hall and adds a new dimension to pop and jazz playing.Insist on a Genuine Bach Mouthpiece Bach mouthpieces are designed to meet every conceivable playing need and have for nearly three quarters of a century. A Bach mouthpiece will make a poor instrument play well, a good instrument play better. Volume and excellent intonation, ease of response in the high and low register, rich, uniform timbre throughout the range, and resistance calculated to increase the player's endurance—these characteristics explain why professional artists choose Bach.