Which has a bigger cup — Bach 12 or Schilke 67?

The Bach 12 has a cup diameter of 32.75 mm / 1.2894 in compared to 32.41 mm / 1.2760 in on the Schilke 67 — a difference of 0.34 mm / 0.0134 in. A wider cup generally produces a fuller, darker tone but requires more air support.

How does cup depth compare between Bach 12 and Schilke 67?

Both mouthpieces share a medium cup depth, so the sound character from depth alone will be very similar.

Bach 12 vs Schilke 67

Name: Schilke 67
Brand: Schilke

The Bach 12 has a wider cup diameter.

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 67

• Tuba

Backbore21/64.3281"

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.