Bach 15C vs Bruno Tilz 306-5 GS

The Bruno Tilz 306-5 GS has a wider cup diameter, the Bruno Tilz 306-5 GS features a deeper cup, the Bruno Tilz 306-5 GS has a larger throat opening.

Overall Comparison Cup Diameter Cup Depth Rim Width Throat Diameter Backbore Finish Material
Base metal or construction (e.g. brass, stainless steel, plastic). Influences weight, response, and tone color.
Mouthpiece A
    Bach 15C
    • Trombone
    Material
    Best suited for
    📣High-volume projection — open throat for power
    vs
    Mouthpiece B
      Bruno Tilz 306-5 GS
      • Trombone
      Catalog
      Material
      Best suited for
      📣High-volume projection — open throat for power

      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 15C details Bruno Tilz 306-5 GS details Bach 15C equivalents Bruno Tilz 306-5 GS equivalents