Which has a bigger cup — Bach 2½C or Monette Cornet BP1-5 Rim?

The Monette Cornet BP1-5 Rim has a cup diameter of 17.00 mm / 0.6693 in compared to 16.40 mm / 0.6457 in on the Bach 2½C — 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 2½C and Monette Cornet BP1-5 Rim?

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

Bach 2½C vs Monette Cornet BP1-5 Rim

Name: Monette Cornet BP1-5 Rim
Brand: Monette

The Monette Cornet BP1-5 Rim has a wider cup diameter.

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

The taper behind the throat leading to the shank. Affects projection and tone character.

Mouthpiece A

Bach 2½C

• Cornet

Backbore—

Best suited for

🎵All-round versatile — balanced cup for general playing

Mouthpiece B

Monette Cornet BP1-5 Rim

• Cornet

Backbore—

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.