Which has a bigger cup — Bach 18 or Curry 12C?

The Curry 12C has a cup diameter of 24.23 mm / 0.9540 in compared to 24.20 mm / 0.9528 in on the Bach 18 — a difference of 0.03 mm / 0.0012 in. A wider cup generally produces a fuller, darker tone but requires more air support.

How does cup depth compare between Bach 18 and Curry 12C?

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

Bach 18 vs Curry 12C

Name: Curry 12C
Brand: Curry

The Curry 12C has a wider cup diameter, the Curry 12C 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

• Trombone

Material—

Best suited for

📣High-volume projection — open throat for power

Mouthpiece B

Curry 12C

• Trombone

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.