Boosey & Hawkes Kosi-Kup Euphonium No. 3

Manufacturer Notes

Kosi-Kup was a major Boosey & Hawkes/Hawkes-era brass band mouthpiece family. The euphonium No. 3 profile is documented around a narrow 25.0 mm cup diameter, 6.70 mm throat, medium to medium-deep cup concept, and the British medium shank used on Imperial-era low brass. It represents the lighter, focused mid-century British brass band sound before the Sovereign/Denis Wick large-shank transition.

Known Variants

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