Which has a bigger cup — Bach 9D or Kelly SCREAMER?

The Bach 9D has a cup diameter of 16.05 mm / 0.6319 in compared to 16.00 mm / 0.6299 in on the Kelly SCREAMER — a difference of 0.05 mm / 0.0020 in. A wider cup generally produces a fuller, darker tone but requires more air support.

How does cup depth compare between Bach 9D and Kelly SCREAMER?

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

Bach 9D vs Kelly SCREAMER

Name: Kelly SCREAMER
Brand: Kelly

The Bach 9D has a wider cup diameter, the Bach 9D has a larger throat opening.

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

Surface plating or treatment (e.g. silver plate, gold trim). Affects feel, durability, and appearance.

Mouthpiece A

Bach 9D

• Cornet

Finish—

Best suited for

🎺Lead / commercial — shallow cup for brightness and range

Mouthpiece B

Kelly SCREAMER

• Cornet

Lead

Finish—

Best suited for

🎺Lead / commercial — shallow cup for brightness and range

⚡Screamer / high notes — tight throat with shallow cup

📋Lead / soprano cornet

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.

Open in interactive tool + Add third mouthpiece Bach 9D details Kelly SCREAMER details Bach 9D equivalents Kelly SCREAMER equivalents

Bach 9D vs Kelly SCREAMER

Playing Characteristics

What Do These Model Names Mean?

What Changes If You Switch?

Which is better?

Compare Bach 9D with others

Compare Kelly SCREAMER with others

Popular Cornet comparisons

Bach vs Kelly

Browse by specification