Which has a bigger cup — Bach 18 or Marcinkiewicz ETU1J. Self?

The Marcinkiewicz ETU1J. Self has a cup diameter of 33.15 mm / 1.3051 in compared to 32.10 mm / 1.2638 in on the Bach 18 — a difference of 1.05 mm / 0.0413 in. A wider cup generally produces a fuller, darker tone but requires more air support.

How does cup depth compare between Bach 18 and Marcinkiewicz ETU1J. Self?

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

Bach 18 vs Marcinkiewicz ETU1J. Self

Name: Marcinkiewicz ETU1J. Self
Brand: Marcinkiewicz

The Marcinkiewicz ETU1J. Self has a wider cup diameter, the Bach 18 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 18

• Tuba

Backbore—

Best suited for

📣High-volume projection — open throat for power

Mouthpiece B

Marcinkiewicz ETU1J. Self

• Tuba

Backbore—

Best suited for

📣High-volume projection — open throat for power

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.

Open in interactive tool + Add third mouthpiece Bach 18 details Marcinkiewicz ETU1J. Self details Bach 18 equivalents Marcinkiewicz ETU1J. Self equivalents

Bach 18 vs Marcinkiewicz ETU1J. Self

Playing Characteristics

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Which is better?

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