Bach 10½D vs Monette Cornet B4D S3
The Monette Cornet B4D S3 has a wider cup diameter, the Monette Cornet B4D S3 features a deeper cup.
Mouthpiece A
Bach 10½D
• Cornet
Cup diameter15.90 mm
Cup depthShallow
Rim width—
Throat diameter3.66 mm
Backbore—
Finish—
Material—
Best suited for
Lead / commercial — shallow cup for brightness and range
vs
Mouthpiece B
Monette Cornet B4D S3
• Cornet
Cup diameter16.20 mm
Cup depthMedium
Rim width—
Throat diameter3.66 mm
Backbore—
Finish—
Material—
Best suited for
All-round versatile — balanced cup for general playing
Cup Diameter
The Monette Cornet B4D S3 has a cup diameter of 16.20 mm compared to 15.90 mm on the Bach 10½D — a difference of +0.30 mm. A wider cup generally produces a fuller, darker tone but requires more air support.
Cup Depth
The Monette Cornet B4D S3 has a medium cup while the Bach 10½D has a shallow cup. Deeper cups favor a darker, richer sound; shallower cups provide more brightness and easier upper register.
Throat Diameter
Throat diameters are essentially identical at 3.66 mm, 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.