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Bach 4 vs Bruno Tilz 306-2 B

the Bruno Tilz 306-2 B has a larger throat opening.

Overall Comparison Cup Diameter Cup Depth Rim Width Throat Diameter Backbore Finish Material
Mouthpiece A
    Bach 4
    • Trombone
    Cup diameter26.00 mm / 1.0236 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
      Bruno Tilz 306-2 B
      • Trombone
      Catalog
      Cup diameter26.00 mm / 1.0236 in
      Cup depthMedium
      Rim width—
      Throat diameter6.20 mm / 0.2441 in
      Backbore—
      Finish—
      Material—
      Best suited for
      📣High-volume projection — open throat for power

      Cup Diameter

      Both mouthpieces have virtually identical cup diameters at 26.00 mm / 1.0236 in.

      Cup Depth

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

      Throat Diameter

      The Bruno Tilz 306-2 B has a wider throat (6.20 mm / 0.2441 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 4 details Bruno Tilz 306-2 B details Bach 4 equivalents Bruno Tilz 306-2 B equivalents

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