Which has a bigger cup — Bach 1½C or Monette Cornet BP2.5 S3?

The Bach 1½C has a cup diameter of 17.00 mm / 0.6693 in compared to 16.40 mm / 0.6457 in on the Monette Cornet BP2.5 S3 — a difference of 0.60 mm / 0.0236 in. A wider cup generally produces a fuller, darker tone but requires more air support.

How does cup depth compare between Bach 1½C and Monette Cornet BP2.5 S3?

Both mouthpieces share a medium cup depth, so the sound character from depth alone will be very similar.

Bach 1½C vs Monette Cornet BP2.5 S3

Name: Monette Cornet BP2.5 S3
Brand: Monette

The Bach 1½C has a wider cup diameter.

Overall Comparison Cup Diameter Cup Depth Rim Width Throat Diameter Backbore Finish Material

Base metal or construction (e.g. brass, stainless steel, plastic). Influences weight, response, and tone color.

Mouthpiece A

Bach 1½C

• Cornet

Material—

Mouthpiece B

Monette Cornet BP2.5 S3

• Cornet

Material—

Best suited for

🎵All-round versatile — balanced cup for general playing

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.