Bach 3E vs Yamaha CR-11B4L
The Yamaha CR-11B4L has a wider cup diameter, the Bach 3E has a larger throat opening.
The internal diameter of the cup, measured at the widest point inside the rim.
Mouthpiece A
Bach 3E
• Cornet
Cup diameter16.30 mm / 0.6417 in
vs
Mouthpiece B
Yamaha CR-11B4L
• Cornet
Cup diameter16.64 mm / 0.6551 in
Cup Diameter
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 3E — a difference of 0.34 mm / 0.0134 in. A wider cup generally produces a fuller, darker tone but requires more air support.
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.