Marcinkiewicz CH 3FLD vs Marcinkiewicz 3FLB
the Marcinkiewicz CH 3FLD has a larger throat opening.
The internal diameter of the cup, measured at the widest point inside the rim.
Mouthpiece A
Marcinkiewicz CH 3FLD
• Flugelhorn
Cup diameter17.25 mm / 0.6791 in
Best suited for
High-volume projection — open throat for power
vs
Mouthpiece B
Marcinkiewicz 3FLB
• Flugelhorn
Cup diameter17.25 mm / 0.6791 in
Best suited for
High-volume projection — open throat for power
Cup Diameter
Both mouthpieces have virtually identical cup diameters at 17.25 mm / 0.6791 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.