How does cup depth compare between Marcinkiewicz 306 and Marcinkiewicz 3 / 5C?

The Marcinkiewicz 3 / 5C has a medium cup while the Marcinkiewicz 306 has a shallow cup. Deeper cups favor a darker, richer sound; shallower cups provide more brightness and easier upper register.

Marcinkiewicz 306 vs Marcinkiewicz 3 / 5C

Name: Marcinkiewicz 3 / 5C
Brand: Marcinkiewicz

the Marcinkiewicz 3 / 5C features a deeper cup.

Overall Comparison Cup Diameter Cup Depth Rim Width Throat Diameter Backbore Finish Material

The internal diameter of the cup, measured at the widest point inside the rim.

Mouthpiece A

Marcinkiewicz 306

• Cornet

Cup diameter17.20 mm / 0.6772 in

Mouthpiece B

Marcinkiewicz 3 / 5C

• Cornet

Cup diameter17.20 mm / 0.6772 in

Cup Diameter

Both mouthpieces have virtually identical cup diameters at 17.20 mm / 0.6772 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.