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.

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

How deep the cup is, from shallow (brighter, easier high register) to deep (darker, fuller sound).

Mouthpiece A

Bach 3D

• Cornet

Cup depthShallow

Mouthpiece B

Yamaha CR-11B4L

• Cornet

Cup depthShallow

Cup Depth

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

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.