Bach 12E vs Curry 11S
The Bach 12E has a wider cup diameter, the Curry 11S has a larger throat opening.
Mouthpiece A
Bach 12E
• Trombone
Cup diameter24.50 mm / 0.9646 in
Cup depthShallow
Rim width—
Throat diameter5.85 mm / 0.2303 in
Backbore—
Finish—
Material—
Best suited for
High-volume projection — open throat for power
vs
Mouthpiece B
Curry 11S
• Trombone
Cup diameter24.49 mm / 0.9640 in
Cup depthShallow
Rim width—
Throat diameter6.02 mm / 0.2370 in
Backbore—
Finish—
Material—
Best suited for
High-volume projection — open throat for power
Cup Diameter
The Bach 12E has a cup diameter of 24.50 mm / 0.9646 in compared to 24.49 mm / 0.9640 in on the Curry 11S — a difference of 0.01 mm / 0.0006 in. A wider cup generally produces a fuller, darker tone but requires more air support.
Cup Depth
Both mouthpieces share a shallow cup depth, so the sound character from depth alone will be very similar.
Throat Diameter
The Curry 11S has a wider throat (6.02 mm / 0.2370 in vs 5.85 mm / 0.2303 in). A wider throat allows more air through, increasing volume and projection but reducing resistance.
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.