Bach 12 vs Schilke 69C4
the Schilke 69C4 features a deeper cup.
The internal diameter of the cup, measured at the widest point inside the rim.
Mouthpiece A
Bach 12
• Tuba
Cup diameter32.75 mm / 1.2894 in
Best suited for
High-volume projection — open throat for power
vs
Mouthpiece B
Schilke 69C4
• Tuba
Cup diameter32.76 mm / 1.2898 in
Best suited for
Orchestral playing — large cup for full, dark tone
High-volume projection — open throat for power
Cup Diameter
Both mouthpieces have virtually identical cup diameters at 32.75 mm / 1.2894 in.
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.