Yamaha CR-11A4L vs Yamaha CR-11B4L
The Yamaha CR-11B4L has a wider cup diameter, the Yamaha CR-11B4L features a deeper cup.
The narrowest point at the bottom of the cup. Affects resistance, volume, and tone color.
Mouthpiece A
Yamaha CR-11A4L
• Cornet
Throat diameter3.65 mm / 0.1437 in
Best suited for
Lead / commercial — shallow cup for brightness and range
vs
Mouthpiece B
Yamaha CR-11B4L
• Cornet
Throat diameter3.65 mm / 0.1437 in
Throat Diameter
Throat diameters are essentially identical at 3.65 mm / 0.1437 in, so resistance feel will be comparable.
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.