Which has a bigger cup — Bach 12E or Schilke 42B?

The Bach 12E has a cup diameter of 24.50 mm / 0.9646 in compared to 22.99 mm / 0.9051 in on the Schilke 42B — a difference of 1.51 mm / 0.0594 in. A wider cup generally produces a fuller, darker tone but requires more air support.

How does cup depth compare between Bach 12E and Schilke 42B?

The Schilke 42B has a medium cup while the Bach 12E has a shallow cup. Deeper cups favor a darker, richer sound; shallower cups provide more brightness and easier upper register.

Bach 12E vs Schilke 42B

Name: Schilke 42B
Brand: Schilke

The Bach 12E has a wider cup diameter, the Schilke 42B features a deeper cup, the Schilke 42B 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 12E

• Trombone

Backbore—

Best suited for

📣High-volume projection — open throat for power

Mouthpiece B

Schilke 42B

• Trombone

Backbore15/64 .2344"

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 12E details Schilke 42B details Bach 12E equivalents Schilke 42B equivalents

Bach 12E vs Schilke 42B

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Which is better?

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