Bach 9D vs Kelly SCREAMER-UK
The Bach 9D has a wider cup diameter, the Bach 9D has a larger throat opening.
Base metal or construction (e.g. brass, stainless steel, plastic). Influences weight, response, and tone color.
Mouthpiece A
Bach 9D
• Cornet
Material—
Best suited for
Lead / commercial — shallow cup for brightness and range
vs
Mouthpiece B
Kelly SCREAMER-UK
• Cornet
LeadMaterialLexan 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 9D is described as unspecified, and the Kelly SCREAMER-UK 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.