Which has a bigger cup — Bach 5MV or Marcinkiewicz 12?

The Marcinkiewicz 12 has a cup diameter of 16.31 mm / 0.6421 in compared to 16.25 mm / 0.6398 in on the Bach 5MV — a difference of 0.06 mm / 0.0024 in. A wider cup generally produces a fuller, darker tone but requires more air support.

How does cup depth compare between Bach 5MV and Marcinkiewicz 12?

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

Bach 5MV vs Marcinkiewicz 12

Name: Marcinkiewicz 12
Brand: Marcinkiewicz

The Marcinkiewicz 12 has a wider cup diameter, the Bach 5MV has a larger throat opening.

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

Base metal or construction (e.g. brass, stainless steel, plastic). Influences weight, response, and tone color.

Mouthpiece A

Bach 5MV

• Cornet

Material—

Best suited for

📣High-volume projection — open throat for power

Mouthpiece B

Marcinkiewicz 12

• Cornet

Material—

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.