Which has a bigger cup — Bach 10½D or Bach 11EW?

The Bach 10½D has a cup diameter of 15.90 mm / 0.6260 in compared to 15.70 mm / 0.6181 in on the Bach 11EW — a difference of 0.20 mm / 0.0079 in. A wider cup generally produces a fuller, darker tone but requires more air support.

How does cup depth compare between Bach 10½D and Bach 11EW?

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

Bach 10½D vs Bach 11EW

Name: Bach 11EW
Brand: Bach

The Bach 10½D 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 10½D

• Cornet

Throat diameter3.66 mm / 0.1441 in

Best suited for

🎺Lead / commercial — shallow cup for brightness and range

Mouthpiece B

Bach 11EW

• 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 10½D vs Bach 11EW

Throat Diameter

Playing Characteristics

What Do These Model Names Mean?

What Changes If You Switch?

Which is better?

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