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Bach 19 vs Yamaha SL-48DL

The Yamaha SL-48DL has a wider cup diameter, the Yamaha SL-48DL 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 19
    • Trombone
    Cup diameter24.00 mm / 0.9449 in
    Best suited for
    🎻Orchestral playing — large cup for full, dark tone
    📣High-volume projection — open throat for power
    vs
    Mouthpiece B
      Yamaha SL-48DL
      • Trombone
      Cup diameter25.25 mm / 0.9941 in
      Best suited for
      🎻Orchestral playing — large cup for full, dark tone
      📣High-volume projection — open throat for power

      Cup Diameter

      The Yamaha SL-48DL has a cup diameter of 25.25 mm / 0.9941 in compared to 24.00 mm / 0.9449 in on the Bach 19 — a difference of 1.25 mm / 0.0492 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 19 details Yamaha SL-48DL details Bach 19 equivalents Yamaha SL-48DL equivalents

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