Denis Wick SM3 vs Kelly 51D-EU

The Denis Wick SM3 has a wider cup diameter, the Kelly 51D-EU features a deeper cup.

Overall Comparison Cup Diameter Cup Depth Rim Width Throat Diameter Backbore Finish Material
Base metal or construction (e.g. brass, stainless steel, plastic). Influences weight, response, and tone color.
Mouthpiece A
    Denis Wick SM3
    • Baritone / Euphonium
    Material
    Best suited for
    🎻Orchestral playing — large cup for full, dark tone
    📣High-volume projection — open throat for power
    vs
    Mouthpiece B
      Kelly 51D-EU
      • Baritone / Euphonium
      Professional
      MaterialLexan polycarbonate
      Best suited for
      🎻Orchestral playing — large cup for full, dark tone
      📋Professional euphonium

      Material

      The Denis Wick SM3 is described as unspecified, and the Kelly 51D-EU as Lexan polycarbonate. 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 Denis Wick SM3 details Kelly 51D-EU details Denis Wick SM3 equivalents Kelly 51D-EU equivalents