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Bach 8 vs Bach 9

The Bach 8 has a wider cup diameter, the Bach 9 features a deeper cup.

Overall Comparison Cup Diameter Cup Depth Rim Width Throat Diameter Backbore Finish Material
How deep the cup is, from shallow (brighter, easier high register) to deep (darker, fuller sound).
Mouthpiece A
    Bach 8
    • Trombone
    Cup depthMedium
    Best suited for
    📣High-volume projection — open throat for power
    vs
    Mouthpiece B
      Bach 9
      • Trombone
      Cup depthDeep
      Best suited for
      🎻Orchestral playing — large cup for full, dark tone
      📣High-volume projection — open throat for power

      Cup Depth

      The Bach 9 has a deep cup while the Bach 8 has a medium cup. Deeper cups favor a darker, richer sound; shallower cups provide more brightness and easier upper register.

      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 Bach 9 details Bach 8 equivalents Bach 9 equivalents

      Compare Bach 8 with others

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