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

The Curry 12S has a cup diameter of 24.23 mm / 0.9540 in compared to 24.20 mm / 0.9528 in on the Bach 18D — 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 18D and Curry 12S?

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

Bach 18D vs Curry 12S

Name: Curry 12S
Brand: Curry

The Curry 12S has a wider cup diameter, the Curry 12S has a larger throat opening.

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

The width of the rim surface that contacts the lips. Wider rims improve endurance; narrower rims improve flexibility.

Mouthpiece A

Bach 18D

• Trombone

Rim width—

Best suited for

📣High-volume projection — open throat for power

Mouthpiece B

Curry 12S

• Trombone

Rim width—

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.

Open in interactive tool + Add third mouthpiece Bach 18D details Curry 12S details Bach 18D equivalents Curry 12S equivalents

Bach 18D vs Curry 12S

Playing Characteristics

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What Changes If You Switch?

Which is better?

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