Which has a bigger cup — Bach 1D or Marcinkiewicz 306?

The Marcinkiewicz 306 has a cup diameter of 17.20 mm / 0.6772 in compared to 17.00 mm / 0.6693 in on the Bach 1D — a difference of 0.20 mm / 0.0079 in. A wider cup generally produces a fuller, darker tone but requires more air support.

How does cup depth compare between Bach 1D and Marcinkiewicz 306?

Both mouthpieces share a shallow cup depth, so the sound character from depth alone will be very similar.

Bach 1D vs Marcinkiewicz 306

Name: Marcinkiewicz 306
Brand: Marcinkiewicz

The Marcinkiewicz 306 has a wider cup diameter, the Marcinkiewicz 306 has a larger throat opening.

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

Surface plating or treatment (e.g. silver plate, gold trim). Affects feel, durability, and appearance.

Mouthpiece A

Bach 1D

• Cornet

Finish—

Mouthpiece B

Marcinkiewicz 306

• Cornet

Finish—

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.