Bach 12 vs Bruno Tilz 211-D 7
The Bruno Tilz 211-D 7 has a wider cup diameter, the Bach 12 features a deeper cup, the Bach 12 has a larger throat opening.
The internal diameter of the cup, measured at the widest point inside the rim.
Mouthpiece A
Bach 12
• French Horn
Cup diameter16.50 mm / 0.6496 in
Best suited for
All-round versatile — balanced cup for general playing
High-volume projection — open throat for power
vs
Mouthpiece B
Bruno Tilz 211-D 7
• French Horn
CatalogCup diameter19.00 mm / 0.7480 in
Best suited for
High-volume projection — open throat for power
Cup Diameter
The Bruno Tilz 211-D 7 has a cup diameter of 19.00 mm / 0.7480 in compared to 16.50 mm / 0.6496 in on the Bach 12 — a difference of 2.50 mm / 0.0984 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.