Yamaha HR-34B vs Yamaha HR-BACON
The Yamaha HR-34B has a wider cup diameter, the Yamaha HR-BACON has a larger throat opening.
Mouthpiece A
Yamaha HR-34B
• French Horn
Cup diameter18.07 mm
Cup depthShallow
Rim width—
Throat diameter3.90 mm
BackboreSemi-wide
Finish—
Material—
Best suited for
High-volume projection — open throat for power
vs
Mouthpiece B
Yamaha HR-BACON
• French Horn
Cup diameter17.99 mm
Cup depthShallow
Rim width—
Throat diameter4.50 mm
BackboreSemi-wide
Finish—
Material—
Best suited for
High-volume projection — open throat for power
Cup Diameter
The Yamaha HR-34B has a cup diameter of 18.07 mm compared to 17.99 mm on the Yamaha HR-BACON — a difference of +0.08 mm. A wider cup generally produces a fuller, darker tone but requires more air support.
Cup Depth
Both mouthpieces share a shallow cup depth, so the sound character from depth alone will be very similar.
Throat Diameter
The Yamaha HR-BACON has a wider throat (4.50 mm vs 3.90 mm). 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.