The Mercer & Barker MB4W Tuba Mouthpiece is the premium variant built upon the successful foundation of the MB4, engineered for soloists who desire enhanced air flow and flexibility on their EEb or F tuba. Developed in collaboration with leading tuba soloist Les Neish, the MB4W takes the focused solo design of the MB4 and opens it up for increased responsiveness.
Sharing the MB4’s 31.70 mm cup diameter and comfortable 8.00 mm rim, the MB4W is identical in all major contact points. The critical difference is its wider 8.70 mm throat/bore. This enlarged bore dramatically reduces back-pressure, offering an ultra free-blowing experience that supports greater air volume and helps the player sustain a full, singing tone with greater endurance.
Like the MB4, the cup is shaped to help the upper register "sing," but the wider throat allows the low register to speak with more body and ease than the standard model, balancing clarity with a powerful, open tone. The bore (throat) is 8.70 mm, which is wider than the MB4. The key benefit of the MB4W is its superior flow, reduced resistance, and enhanced flexibility for demanding solo repertoire. Choose the MB4W to maximize your performance on EEb and F tubas, giving you the perfect blend of solo clarity and a powerfully open tone.
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