Which has a bigger cup — Bach 12E or Schilke 47B?

The Schilke 47B has a cup diameter of 24.87 mm / 0.9791 in compared to 24.50 mm / 0.9646 in on the Bach 12E — a difference of 0.37 mm / 0.0146 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 47B?

The Schilke 47B 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 47B

Name: Schilke 47B
Brand: Schilke

The Schilke 47B has a wider cup diameter, the Schilke 47B features a deeper cup, the Schilke 47B has a larger throat opening.

Overall Comparison Cup Diameter Cup Depth Rim Width Throat Diameter Backbore Finish Material

Surface plating or treatment (e.g. silver plate, gold trim). Affects feel, durability, and appearance.

Mouthpiece A

Bach 12E

• Trombone

Finish—

Best suited for

📣High-volume projection — open throat for power

Mouthpiece B

Schilke 47B

• Trombone

Finish—

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 47B details Bach 12E equivalents Schilke 47B equivalents

Bach 12E vs Schilke 47B

Playing Characteristics

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What Changes If You Switch?

Which is better?

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