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Bach 12E vs Bruno Tilz 305-4 MSG

The Bruno Tilz 305-4 MSG has a wider cup diameter, the Bruno Tilz 305-4 MSG features a deeper cup, the Bruno Tilz 305-4 MSG 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 12E
    • Trombone
    Throat diameter5.85 mm / 0.2303 in
    Best suited for
    📣High-volume projection — open throat for power
    vs
    Mouthpiece B
      Bruno Tilz 305-4 MSG
      • Trombone
      Catalog
      Throat diameter6.50 mm / 0.2559 in
      Best suited for
      📣High-volume projection — open throat for power

      Throat Diameter

      The Bruno Tilz 305-4 MSG has a wider throat (6.50 mm / 0.2559 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 12E details Bruno Tilz 305-4 MSG details Bach 12E equivalents Bruno Tilz 305-4 MSG equivalents

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