Bach 10½C vs Monette AP1-5 S3
The Monette AP1-5 S3 has a wider cup diameter.
Mouthpiece A
Bach 10½C
• Trumpet
Cup diameter15.90 mm
Cup depthMedium
Rim width—
Throat diameter3.66 mm
Backbore—
Finish—
Material—
vs
Mouthpiece B
Monette AP1-5 S3
• Trumpet
Cup diameter17.00 mm
Cup depthMedium
Rim width—
Throat diameter3.66 mm
Backbore—
Finish—
Material—
Cup Diameter
The Monette AP1-5 S3 has a cup diameter of 17.00 mm compared to 15.90 mm on the Bach 10½C — a difference of +1.10 mm. 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
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.