Which has a bigger cup — Marcinkiewicz 306 or Marcinkiewicz 307?

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

How does cup depth compare between Marcinkiewicz 306 and Marcinkiewicz 307?

The Marcinkiewicz 307 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 307

Name: Marcinkiewicz 307
Brand: Marcinkiewicz

the Marcinkiewicz 307 features a deeper cup.

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

The taper behind the throat leading to the shank. Affects projection and tone character.

Mouthpiece A

Marcinkiewicz 306

• Cornet

Backbore—

Mouthpiece B

Marcinkiewicz 307

• Cornet

Backbore—

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.