Which has a bigger cup — Bach 12E or Schilke 40?

The Bach 12E has a cup diameter of 24.50 mm / 0.9646 in compared to 22.53 mm / 0.8870 in on the Schilke 40 — a difference of 1.97 mm / 0.0776 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 40?

The Schilke 40 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 40

Name: Schilke 40
Brand: Schilke

The Bach 12E has a wider cup diameter, the Schilke 40 features a deeper cup, the Schilke 40 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 40

• 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 40 details Bach 12E equivalents Schilke 40 equivalents

Bach 12E vs Schilke 40

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Which is better?

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