Which has a bigger cup — Bach 12 or Schilke 69C4?

Both mouthpieces have virtually identical cup diameters at 32.75 mm / 1.2894 in.

How does cup depth compare between Bach 12 and Schilke 69C4?

The Schilke 69C4 has a deep cup while the Bach 12 has a medium cup. Deeper cups favor a darker, richer sound; shallower cups provide more brightness and easier upper register.

Bach 12 vs Schilke 69C4

Name: Schilke 69C4
Brand: Schilke

the Schilke 69C4 features a deeper cup.

Overall Comparison Cup Diameter Cup Depth Rim Width Throat Diameter Backbore Finish Material

The taper behind the throat leading to the shank. Affects projection and tone character.

Mouthpiece A

Bach 12

• Tuba

Backbore—

Best suited for

📣High-volume projection — open throat for power

Mouthpiece B

Schilke 69C4

• Tuba

Backbore21/64.3281"

Best suited for

🎻Orchestral playing — large cup for full, dark tone

📣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.