Bruno Tilz 211-A4 vs Yamaha HR-30B
The Bruno Tilz 211-A4 has a wider cup diameter, the Yamaha HR-30B features a deeper cup, the Bruno Tilz 211-A4 has a larger throat opening.
The internal diameter of the cup, measured at the widest point inside the rim.
Mouthpiece A
Bruno Tilz 211-A4
• French Horn
CatalogCup diameter17.50 mm / 0.6890 in
Best suited for
High-volume projection — open throat for power
vs
Mouthpiece B
Yamaha HR-30B
• French Horn
Cup diameter17.27 mm / 0.6799 in
Best suited for
High-volume projection — open throat for power
Cup Diameter
The Bruno Tilz 211-A4 has a cup diameter of 17.50 mm / 0.6890 in compared to 17.27 mm / 0.6799 in on the Yamaha HR-30B — a difference of 0.23 mm / 0.0091 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.