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Kelly 18 vs Monette Tuba 98 (Lightweight)

the Kelly 18 features a deeper cup.

Overall Comparison Cup Diameter Cup Depth Rim Width Throat Diameter Backbore Finish Material
Mouthpiece A
    Kelly 18
    • Tuba
    General
    Cup diameter32.77 mm / 1.2902 in
    Cup depth
    Rim width—
    Throat diameter—
    BackboreM
    Finish—
    MaterialLexan polycarbonate
    Best suited for
    🎻Orchestral playing — large cup for full, dark tone
    📋Industry-standard tuba
    vs
    Mouthpiece B
      Monette Tuba 98 (Lightweight)
      • Tuba
      Cup diameter—
      Cup depthMedium
      Rim width—
      Throat diameter—
      Backbore—
      Finish—
      Material—

      Cup Depth

      The Kelly 18 has a — cup while the Monette Tuba 98 (Lightweight) has a medium cup. Deeper cups favor a darker, richer sound; shallower cups provide more brightness and easier upper register.

      Material

      The Kelly 18 is described as Lexan polycarbonate, and the Monette Tuba 98 (Lightweight) as unspecified. Material affects mass, warmth, and how quickly the piece responds.

      Which is better?

      Neither mouthpiece clearly dominates the other — the right choice depends on your embouchure, playing style, and the sound you're after. Try both if possible.

      Open in interactive tool + Add third mouthpiece Kelly 18 details Monette Tuba 98 (Lightweight) details Kelly 18 equivalents Monette Tuba 98 (Lightweight) equivalents

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