Which has a bigger cup — Bach 3D or Yamaha CR-11B4L?

The Yamaha CR-11B4L has a cup diameter of 16.64 mm / 0.6551 in compared to 16.30 mm / 0.6417 in on the Bach 3D — a difference of 0.34 mm / 0.0134 in. A wider cup generally produces a fuller, darker tone but requires more air support.

How does cup depth compare between Bach 3D and Yamaha CR-11B4L?

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

Bach 3D vs Yamaha CR-11B4L

Name: Yamaha CR-11B4L
Brand: Yamaha

The Yamaha CR-11B4L has a wider cup diameter, the Bach 3D has a larger throat opening.

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

The width of the rim surface that contacts the lips. Wider rims improve endurance; narrower rims improve flexibility.

Mouthpiece A

Bach 3D

• Cornet

Rim width—

Mouthpiece B

Yamaha CR-11B4L

• Cornet

Rim width—

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.