Which has a bigger cup — Bach 9B or Monette Cornet E4S rim?

The Monette Cornet E4S rim has a cup diameter of 16.20 mm / 0.6378 in compared to 16.05 mm / 0.6319 in on the Bach 9B — a difference of 0.15 mm / 0.0059 in. A wider cup generally produces a fuller, darker tone but requires more air support.

How does cup depth compare between Bach 9B and Monette Cornet E4S rim?

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

Bach 9B vs Monette Cornet E4S rim

Name: Monette Cornet E4S rim
Brand: Monette

The Monette Cornet E4S rim has a wider cup diameter.

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

The narrowest point at the bottom of the cup. Affects resistance, volume, and tone color.

Mouthpiece A

Bach 9B

• Cornet

Throat diameter3.66 mm / 0.1441 in

Mouthpiece B

Monette Cornet E4S rim

• Cornet

Throat diameter3.66 mm / 0.1441 in

Throat Diameter

Throat diameters are essentially identical at 3.66 mm / 0.1441 in, 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.

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Bach 9B vs Monette Cornet E4S rim

Throat Diameter

Playing Characteristics

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What Changes If You Switch?

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