The Mercer & Barker GW3 Euphonium Mouthpiece, a signature model developed with Cory Band Solo Euphonium Glyn Williams, is the essential upgrade for players demanding the classic British euphonium sound blended with modern precision and comfort. This is the "do-everything" mouthpiece, perfectly balancing warmth, projection, and control across every register.
The GW3 is built to excel in solo, brass band, and wind band settings. It features a deep cup and a relatively open throat (7.48 mm) that produces a rich, resonant tone and an effortless low register, while maintaining secure focus in the high range. The core specifications include a 26.40 mm cup and a comfortable 6.50 mm rim, designed to reduce fatigue and stabilize your sound.
Crafted in high-quality materials, the GW3 has a well-judged mass that stabilizes intonation and slotting without feeling sluggish. Articulations speak cleanly, and the dynamic range all the way from soft lyrical passages to powerful fortissimo band work can be handled with ease and control.
The GW3 is the perfect blend of comfort, balance and weight that consistently outperforms its peers across the whole spectrum. It is positioned as the classic euphonium design in the Mercer & Barker GW series, focusing on a sound that is both focused and warm.
Ideal for:
Advancing Students: Secure pitch and easier response for auditions and honor band work.
Brass Band & Adult Amateurs: Warmth, control, and the credibility of a design used by one of the world's elite solo euphonium players.
Doublers: Sits in a familiar size range to common large-bore trombone mouthpieces (often compared conceptually with SM3, 3AL, DC2, or Schilke 53D), providing an easy switch to a true euphonium-oriented piece.
Specifications:
Inner Diameter: 26.4mm/1in
Rim width: 6.5mm/.26in
Throat: 7.4mm/.29in, open blowing
Cup: Deep
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