Which has a bigger cup — Bach 8½A or Kelly SCREAMER?

The Bach 8½A has a cup diameter of 16.10 mm / 0.6339 in compared to 16.00 mm / 0.6299 in on the Kelly SCREAMER — a difference of 0.10 mm / 0.0039 in. A wider cup generally produces a fuller, darker tone but requires more air support.

How does cup depth compare between Bach 8½A and Kelly SCREAMER?

The Bach 8½A has a very deep cup while the Kelly SCREAMER has a shallow cup. Deeper cups favor a darker, richer sound; shallower cups provide more brightness and easier upper register.

Bach 8½A vs Kelly SCREAMER

Name: Kelly SCREAMER
Brand: Kelly

The Bach 8½A has a wider cup diameter, the Bach 8½A features a deeper cup, the Bach 8½A has a larger throat opening.

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

Base metal or construction (e.g. brass, stainless steel, plastic). Influences weight, response, and tone color.

Mouthpiece A

Bach 8½A

• Cornet

Material—

Mouthpiece B

Kelly SCREAMER

• Cornet

Lead

MaterialLexan polycarbonate

Best suited for

🎺Lead / commercial — shallow cup for brightness and range

⚡Screamer / high notes — tight throat with shallow cup

📋Lead / soprano cornet

Material

The Bach 8½A is described as unspecified, and the Kelly SCREAMER as Lexan polycarbonate. Material affects mass, warmth, and how quickly the piece responds.

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 8½A details Kelly SCREAMER details Bach 8½A equivalents Kelly SCREAMER equivalents

Bach 8½A vs Kelly SCREAMER

Material

Playing Characteristics

What Do These Model Names Mean?

What Changes If You Switch?

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