Bach 1½C vs Conn Precision 1
The Bach 1½C has a wider cup diameter, the Conn Precision 1 features a deeper cup.
The narrowest point at the bottom of the cup. Affects resistance, volume, and tone color.
Mouthpiece A
Bach 1½C
• Cornet
Throat diameter3.66 mm / 0.1441 in
vs
Mouthpiece B
Conn Precision 1
• Cornet
GeneralThroat diameter—
Best suited for
All-around players; comfortable wide rim
Full round tone; suited to low notes
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.