Which has a bigger cup — Bach 5V or Marcinkiewicz 14S?

The Marcinkiewicz 14S has a cup diameter of 16.31 mm / 0.6421 in compared to 16.25 mm / 0.6398 in on the Bach 5V — 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 5V and Marcinkiewicz 14S?

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

Bach 5V vs Marcinkiewicz 14S

Name: Marcinkiewicz 14S
Brand: Marcinkiewicz

The Marcinkiewicz 14S has a wider cup diameter, the Bach 5V has a larger throat opening.

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

Bach 5V

• Cornet

Backbore—

Best suited for

📣High-volume projection — open throat for power

Mouthpiece B

Marcinkiewicz 14S

• 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.