Which has a bigger cup — Yamaha HR-29B or Yamaha HR-33B?

The Yamaha HR-33B has a cup diameter of 17.87 mm / 0.7035 in compared to 17.07 mm / 0.6720 in on the Yamaha HR-29B — a difference of 0.80 mm / 0.0315 in. A wider cup generally produces a fuller, darker tone but requires more air support.

How does cup depth compare between Yamaha HR-29B and Yamaha HR-33B?

Both mouthpieces share a shallow cup depth, so the sound character from depth alone will be very similar.

Yamaha HR-29B vs Yamaha HR-33B

Name: Yamaha HR-33B
Brand: Yamaha

The Yamaha HR-33B has a wider cup diameter.

Overall Comparison Cup Diameter Cup Depth Rim Width Throat Diameter Backbore Finish Material

Base metal or construction (e.g. brass, stainless steel, plastic). Influences weight, response, and tone color.

Mouthpiece A

Yamaha HR-29B

• French Horn

Material—

Best suited for

📣High-volume projection — open throat for power

Mouthpiece B

Yamaha HR-33B

• French Horn

Material—

Best suited for

📣High-volume projection — open throat for power

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.