Bruno Tilz 211-58 vs Yamaha HR-SOMMERVILLE
The Bruno Tilz 211-58 has a wider cup diameter, the Yamaha HR-SOMMERVILLE has a larger throat opening.
The internal diameter of the cup, measured at the widest point inside the rim.
Mouthpiece A
Bruno Tilz 211-58
• French Horn
CatalogCup diameter17.00 mm
Best suited for
High-volume projection — open throat for power
vs
Mouthpiece B
Yamaha HR-SOMMERVILLE
• French Horn
Cup diameter16.93 mm
Best suited for
High-volume projection — open throat for power
Cup Diameter
The Bruno Tilz 211-58 has a cup diameter of 17.00 mm compared to 16.93 mm on the Yamaha HR-SOMMERVILLE — a difference of +0.07 mm. 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.