Conn Imp. Precision 2 vs Yamaha BB-67C4
the Conn Imp. Precision 2 features a deeper cup.
The internal diameter of the cup, measured at the widest point inside the rim.
Mouthpiece A
Conn Imp. Precision 2
• Tuba
GeneralCup diameter—
Best suited for
BBb bass / sousaphone general
Full rich tone in all registers
vs
Mouthpiece B
Yamaha BB-67C4
• Tuba
Cup diameter32.06 mm / 1.2622 in
Best suited for
High-volume projection — open throat for power
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.