Bach 7 vs Curry 7C
The Bach 7 has a wider cup diameter, the Curry 7C has a larger throat opening.
Mouthpiece A
Bach 7
• Trombone
Cup diameter24.75 mm / 0.9744 in
Cup depthMedium
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 7C
• Trombone
Cup diameter24.74 mm / 0.9740 in
Cup depthMedium
Rim width—
Throat diameter5.92 mm / 0.2330 in
Backbore—
Finish—
Material—
Best suited for
High-volume projection — open throat for power
Cup Diameter
The Bach 7 has a cup diameter of 24.75 mm / 0.9744 in compared to 24.74 mm / 0.9740 in on the Curry 7C — a difference of 0.01 mm / 0.0004 in. A wider cup generally produces a fuller, darker tone but requires more air support.
Cup Depth
Both mouthpieces share a medium cup depth, so the sound character from depth alone will be very similar.
Throat Diameter
The Curry 7C has a wider throat (5.92 mm / 0.2330 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.