Which has a bigger cup — Bach 12E or Schilke 51B?

The Schilke 51B has a cup diameter of 25.63 mm / 1.0091 in compared to 24.50 mm / 0.9646 in on the Bach 12E — a difference of 1.13 mm / 0.0445 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 51B?

The Schilke 51B 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 51B

Name: Schilke 51B
Brand: Schilke

The Schilke 51B has a wider cup diameter, the Schilke 51B features a deeper cup, the Schilke 51B 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 51B

• Trombone

BackboreF .257"

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 51B details Bach 12E equivalents Schilke 51B equivalents

Bach 12E vs Schilke 51B

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Which is better?

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