Which has a bigger cup — Bach 7E or Bach 9D?

The Bach 7E has a cup diameter of 16.20 mm / 0.6378 in compared to 16.05 mm / 0.6319 in on the Bach 9D — 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 7E and Bach 9D?

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

Bach 7E vs Bach 9D

Name: Bach 9D
Brand: Bach

The Bach 7E 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 7E

• Cornet

Throat diameter3.66 mm / 0.1441 in

Best suited for

🎺Lead / commercial — shallow cup for brightness and range

Mouthpiece B

Bach 9D

• Cornet

Throat diameter3.66 mm / 0.1441 in

Best suited for

🎺Lead / commercial — shallow cup for brightness and range

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 7E vs Bach 9D

Throat Diameter

Playing Characteristics

What Do These Model Names Mean?

What Changes If You Switch?

Which is better?

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Compare Bach 9D with others

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