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Bach 8 vs Yamaha SL-46C2S

The Bach 8 has a wider cup diameter.

Overall Comparison Cup Diameter Cup Depth Rim Width Throat Diameter Backbore Finish Material
Mouthpiece A
    Bach 8
    • Trombone
    Cup diameter24.75 mm / 0.9744 in
    Cup depthMedium
    Rim width—
    Throat diameter5.85 mm / 0.2303 in
    Backbore—
    Finish—
    Material—
    Best suited for
    📣High-volume projection — open throat for power
    vs
    Mouthpiece B
      Yamaha SL-46C2S
      • Trombone
      Cup diameter24.59 mm / 0.9681 in
      Cup depthMedium
      Rim width—
      Throat diameter5.85 mm / 0.2303 in
      BackboreSemi-narrow
      Finish—
      Material—
      Best suited for
      📣High-volume projection — open throat for power

      Cup Diameter

      The Bach 8 has a cup diameter of 24.75 mm / 0.9744 in compared to 24.59 mm / 0.9681 in on the Yamaha SL-46C2S — a difference of 0.16 mm / 0.0063 in. A wider cup generally produces a fuller, darker tone but requires more air support.

      Cup Depth

      Both mouthpieces share a medium cup depth, so the sound character from depth alone will be very similar.

      Throat Diameter

      Throat diameters are essentially identical at 5.85 mm / 0.2303 in, so resistance feel will be comparable.

      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 8 details Yamaha SL-46C2S details Bach 8 equivalents Yamaha SL-46C2S equivalents

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