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Bach 15 vs Bruno Tilz 304- B 1

The Bach 15 has a wider cup diameter, the Bach 15 features a deeper cup, the Bach 15 has a larger throat opening.

Overall Comparison Cup Diameter Cup Depth Rim Width Throat Diameter Backbore Finish Material
The internal diameter of the cup, measured at the widest point inside the rim.
Mouthpiece A
    Bach 15
    • Baritone / Euphonium
    Cup diameter24.40 mm / 0.9606 in
    Best suited for
    🎻Orchestral playing — large cup for full, dark tone
    📣High-volume projection — open throat for power
    vs
    Mouthpiece B
      Bruno Tilz 304- B 1
      • Baritone / Euphonium
      Catalog
      Cup diameter22.00 mm / 0.8661 in
      Best suited for
      📣High-volume projection — open throat for power

      Cup Diameter

      The Bach 15 has a cup diameter of 24.40 mm / 0.9606 in compared to 22.00 mm / 0.8661 in on the Bruno Tilz 304- B 1 — a difference of 2.40 mm / 0.0945 in. A wider cup generally produces a fuller, darker tone but requires more air support.

      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 Bach 15 details Bruno Tilz 304- B 1 details Bach 15 equivalents Bruno Tilz 304- B 1 equivalents

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