Which has a bigger cup — Bach 18 or Schilke 67?

The Schilke 67 has a cup diameter of 32.41 mm / 1.2760 in compared to 32.10 mm / 1.2638 in on the Bach 18 — a difference of 0.31 mm / 0.0122 in. A wider cup generally produces a fuller, darker tone but requires more air support.

How does cup depth compare between Bach 18 and Schilke 67?

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

Bach 18 vs Schilke 67

Name: Schilke 67
Brand: Schilke

The Schilke 67 has a wider cup diameter, the Bach 18 has a larger throat opening.

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

Base metal or construction (e.g. brass, stainless steel, plastic). Influences weight, response, and tone color.

Mouthpiece A

Bach 18

• Tuba

Material—

Best suited for

📣High-volume projection — open throat for power

Mouthpiece B

Schilke 67

• Tuba

Material—

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.