Yamaha HR-29B vs Yamaha HR-29B
Both mouthpieces share similar core dimensions — the differences are in the details.
Mouthpiece A
Yamaha HR-29B
• French Horn
Cup diameter17.07 mm / 0.6720 in
Cup depthShallow
Rim width—
Throat diameter3.90 mm / 0.1535 in
BackboreSemi-wide
Finish—
Material—
Best suited for
High-volume projection — open throat for power
vs
Mouthpiece B
Yamaha HR-29B
• French Horn
Cup diameter17.07 mm / 0.6720 in
Cup depthShallow
Rim width—
Throat diameter3.90 mm / 0.1535 in
BackboreSemi-wide
Finish—
Material—
Best suited for
High-volume projection — open throat for power
Cup Diameter
Both mouthpieces have virtually identical cup diameters at 17.07 mm / 0.6720 in.
Cup Depth
Both mouthpieces share a shallow cup depth, so the sound character from depth alone will be very similar.
Throat Diameter
Throat diameters are essentially identical at 3.90 mm / 0.1535 in, so resistance feel will be comparable.
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.