Alliance Prestige Euphonium Mouthpiece Model 3A

The Alliance Prestige Euphonium 3A is a versatile large-shank mouthpiece developed as part of the Steven Mead-designed Alliance Prestige series.

With a 26.00 mm cup diameter, the 3A offers a comfortable middle ground between larger professional euphonium mouthpieces and more compact designs. Its “A” configuration is designed to provide a slightly more responsive feel, helping support clean articulation, flexibility, and easier access to the upper register.

The result is a mouthpiece that retains the warm, characteristic euphonium sound associated with the Prestige series while offering a little more immediacy and control than the larger models.

Its balanced dimensions make the 3A particularly useful for players who perform a wide variety of repertoire, from concert band and brass band literature to solo and chamber music.

Specifications

• Cup Diameter: 26.00 mm
• Rim Width: 6.78 mm
• Throat: 7.40 mm
• Cup: Standard / Medium
• Shank: Large
• Instrument: Euphonium

Comparable Sizes

Approximately comparable in general size to:

• Denis Wick 4-series euphonium mouthpieces
• Denis Wick SM4-family sizes
• Bach 4G

Why Choose the Alliance 3A?

The 3A is an excellent choice for players looking for a full euphonium sound combined with a responsive feel and additional upper-register support.

Compared with the larger Alliance 2, the slightly smaller 26.00 mm diameter provides a little more focus and efficiency. The A-style design makes it particularly attractive to players who value flexibility, clean attacks, endurance, and secure high-register playing without moving to a noticeably small mouthpiece.

It can also be a very practical choice for advancing players transitioning into professional-size large-shank euphonium mouthpieces.