Marcinkiewicz 5FLB vs Marcinkiewicz 5FLD
the Marcinkiewicz 5FLD has a larger throat opening.
Mouthpiece A
Marcinkiewicz 5FLB
• Flugelhorn
Cup diameter17.25 mm / 0.6791 in
Cup depthDeep
Rim width—
Throat diameter4.09 mm / 0.1610 in
Backbore—
Finish—
Material—
Best suited for
Orchestral playing — large cup for full, dark tone
High-volume projection — open throat for power
vs
Mouthpiece B
Marcinkiewicz 5FLD
• Flugelhorn
Cup diameter17.25 mm / 0.6791 in
Cup depthDeep
Rim width—
Throat diameter4.32 mm / 0.1701 in
Backbore—
Finish—
Material—
Best suited for
Orchestral playing — large cup for full, dark tone
High-volume projection — open throat for power
Cup Diameter
Both mouthpieces have virtually identical cup diameters at 17.25 mm / 0.6791 in.
Cup Depth
Both mouthpieces share a deep cup depth, so the sound character from depth alone will be very similar.
Throat Diameter
The Marcinkiewicz 5FLD has a wider throat (4.32 mm / 0.1701 in vs 4.09 mm / 0.1610 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.