Classic Euphonium Mouthpiece; Gold Plated; 4AY

The classic euphonium mouthpiece. Open sound with clear attack and a focused low register. This mouthpiece was originally designed by Denis Wick for the best-selling Yamaha 321 euphonium, and features the unusual combination of a small shank with a large bore and backbore. The first 4AYs were made with a slightly smaller shank than the normal S fitting to help the response and intonation of the 321, but the 4AY is now made with a standard S shank. It is a perfect match for the Yamaha 321.

Cup diameter: 26.00mm.
Rim width: 6.72mm.
Throat: 7.38mm.
Backbore: Large. Small shank.