Bach 6BM vs Curry 8.5 TF
The Curry 8.5 TF has a wider cup diameter, the Bach 6BM has a larger throat opening.
The internal diameter of the cup, measured at the widest point inside the rim.
Mouthpiece A
Bach 6BM
• Trumpet
Cup diameter16.20 mm / 0.6378 in
vs
Mouthpiece B
Curry 8.5 TF
• Trumpet
Cup diameter16.23 mm / 0.6390 in
Cup Diameter
The Curry 8.5 TF has a cup diameter of 16.23 mm / 0.6390 in compared to 16.20 mm / 0.6378 in on the Bach 6BM — a difference of 0.03 mm / 0.0012 in. A wider cup generally produces a fuller, darker tone but requires more air support.
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.