Bach 1¼G vs Conn Precision 1
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 1¼G
• Trombone
Throat diameter7.01 mm / 0.2760 in
Best suited for
Orchestral playing — large cup for full, dark tone
High-volume projection — open throat for power
vs
Mouthpiece B
Conn Precision 1
• Trombone
OrchestralThroat diameter—
Best suited for
Large bore trombones; symphony work
Good clear tone; large bore symphonic
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.