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Bach 1¼G vs Bach 12E

The Bach 1¼G has a wider cup diameter, the Bach 1¼G features a deeper cup, the Bach 1¼G has a larger throat opening.

Overall Comparison Cup Diameter Cup Depth Rim Width Throat Diameter Backbore Finish Material
The narrowest point at the bottom of the cup. Affects resistance, volume, and tone color.
Mouthpiece A
    Bach 1¼G
    • Trombone
    Throat diameter7.01 mm / 0.2760 in
    Best suited for
    🎻Orchestral playing — large cup for full, dark tone
    📣High-volume projection — open throat for power
    vs
    Mouthpiece B
      Bach 12E
      • Trombone
      Throat diameter5.85 mm / 0.2303 in
      Best suited for
      📣High-volume projection — open throat for power

      Throat Diameter

      The Bach 1¼G has a wider throat (7.01 mm / 0.2760 in vs 5.85 mm / 0.2303 in). A wider throat allows more air through, increasing volume and projection but reducing resistance.

      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 1¼G details Bach 12E details Bach 1¼G equivalents Bach 12E equivalents

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      Compare Bach 12E with others

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