Marcinkiewicz 3FLS vs Marcinkiewicz 7FLS
the Marcinkiewicz 7FLS features a deeper cup.
Mouthpiece A
Marcinkiewicz 3FLS
• Flugelhorn
Cup diameter17.93 mm / 0.7059 in
Cup depthMedium
Rim width—
Throat diameter4.39 mm / 0.1728 in
Backbore—
Finish—
Material—
Best suited for
High-volume projection — open throat for power
vs
Mouthpiece B
Marcinkiewicz 7FLS
• Flugelhorn
Cup diameter17.93 mm / 0.7059 in
Cup depthVery deep
Rim width—
Throat diameter4.39 mm / 0.1728 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 17.93 mm / 0.7059 in.
Cup Depth
The Marcinkiewicz 7FLS has a very deep cup while the Marcinkiewicz 3FLS has a medium cup. Deeper cups favor a darker, richer sound; shallower cups provide more brightness and easier upper register.
Throat Diameter
Throat diameters are essentially identical at 4.39 mm / 0.1728 in, so resistance feel will be comparable.
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.