Bach 3C vs Monette Unity BP6-7M
Both mouthpieces share similar core dimensions — the differences are in the details.
The internal diameter of the cup, measured at the widest point inside the rim.
Mouthpiece A
Bach 3C
• Trumpet
Cup diameter16.30 mm / 0.6417 in
Best suited for
All-round versatile — balanced cup for general playing
vs
Mouthpiece B
Monette Unity BP6-7M
• Trumpet
Cup diameter16.30 mm / 0.6417 in
Best suited for
All-round versatile — balanced cup for general playing
Cup Diameter
Both mouthpieces have virtually identical cup diameters at 16.30 mm / 0.6417 in.
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.