Yamaha HR-29B vs Yamaha HR-32-GP
The Yamaha HR-32-GP has a wider cup diameter, the Yamaha HR-32-GP features a deeper cup, the Yamaha HR-32-GP has a larger throat opening.
The narrowest point at the bottom of the cup. Affects resistance, volume, and tone color.
Mouthpiece A
Yamaha HR-29B
• French Horn
Throat diameter3.90 mm / 0.1535 in
Best suited for
High-volume projection — open throat for power
vs
Mouthpiece B
Yamaha HR-32-GP
• French Horn
Throat diameter4.40 mm / 0.1732 in
Best suited for
High-volume projection — open throat for power
Throat Diameter
The Yamaha HR-32-GP has a wider throat (4.40 mm / 0.1732 in vs 3.90 mm / 0.1535 in). A wider throat allows more air through, increasing volume and projection but reducing resistance.
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.