Home › Trombone › Bach 15E vs Bruno Tilz 305-D 5

Bach 15E vs Bruno Tilz 305-D 5

The Bruno Tilz 305-D 5 has a wider cup diameter, the Bruno Tilz 305-D 5 features a deeper cup, the Bruno Tilz 305-D 5 has a larger throat opening.

Overall Comparison Cup Diameter Cup Depth Rim Width Throat Diameter Backbore Finish Material
The internal diameter of the cup, measured at the widest point inside the rim.
Mouthpiece A
    Bach 15E
    • Trombone
    Cup diameter24.40 mm / 0.9606 in
    Best suited for
    📣High-volume projection — open throat for power
    vs
    Mouthpiece B
      Bruno Tilz 305-D 5
      • Trombone
      Catalog
      Cup diameter26.00 mm / 1.0236 in
      Best suited for
      📣High-volume projection — open throat for power

      Cup Diameter

      The Bruno Tilz 305-D 5 has a cup diameter of 26.00 mm / 1.0236 in compared to 24.40 mm / 0.9606 in on the Bach 15E — a difference of 1.60 mm / 0.0630 in. A wider cup generally produces a fuller, darker tone but requires more air support.

      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 15E details Bruno Tilz 305-D 5 details Bach 15E equivalents Bruno Tilz 305-D 5 equivalents

      Compare Bach 15E with others

      Compare Bruno Tilz 305-D 5 with others

      Popular Trombone comparisons

      Bach vs Bruno Tilz

      Browse by specification