- Available sizes: 4AM, 4AY, 6BM, 6BY
- Model Number: The first number refers to the cup diameter; the higher the number, the smaller the diameter
- Cup Volume: A – Deep cup; B – Medium cup
- Receiver / Shank type: M – Medium / European shank; Y – USA and Japanese large shank instruments
- Finish: Silver plate
- 4AM: Medium shank; 26mm cup diameter; 6.72mm rim width; 7.38mm throat; Barrel backbore. Designed to fit Pre-1974 B&H and Willson instruments. Classic euphonium mouthpiece for an open sound with clear attacks and focused low register.
- 4AY: USA large shank; 26mm cup diameter; 6.72mm rim width; 7.38mm throat; Medium backbore. Designed for USA or Japanese instruments. Classic design as the 4AM version; Focused low register with open sound.
- 6BM: Medium shank; 25.40mm cup diameter; 6.26mm rim width; 7.12mm throat; Medium backbore. Designed to fit Pre-1974 B&H and Willson instruments. True euphonium sound with clear high register and clean tone.
- 6BY: USA large shank; 25.40mm cup diameter; 6.26mm rim width; 7.12mm throat; Medium backbore. Nice tone with good high register.
| Color | 4AM |
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