Bach 2C vs Yamaha CR-11C4L
The Bach 2C has a wider cup diameter, the Bach 2C has a larger throat opening.
Mouthpiece A
Bach 2C
• Cornet
Cup diameter16.50 mm / 0.6496 in
Cup depthMedium
Rim width—
Throat diameter3.66 mm / 0.1441 in
Backbore—
Finish—
Material—
Best suited for
All-round versatile — balanced cup for general playing
vs
Mouthpiece B
Yamaha CR-11C4L
• Cornet
Cup diameter16.46 mm / 0.6480 in
Cup depthMedium
Rim width—
Throat diameter3.65 mm / 0.1437 in
BackboreStandard
Finish—
Material—
Best suited for
All-round versatile — balanced cup for general playing
Cup Diameter
The Bach 2C has a cup diameter of 16.50 mm / 0.6496 in compared to 16.46 mm / 0.6480 in on the Yamaha CR-11C4L — a difference of 0.04 mm / 0.0016 in. A wider cup generally produces a fuller, darker tone but requires more air support.
Cup Depth
Both mouthpieces share a medium cup depth, so the sound character from depth alone will be very similar.
Throat Diameter
The Bach 2C has a wider throat (3.66 mm / 0.1441 in vs 3.65 mm / 0.1437 in). A wider throat allows more air through, increasing volume and projection but reducing resistance.
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.