Which has a bigger cup — Bach 4 or Schilke 53?

The Schilke 53 has a cup diameter of 26.24 mm / 1.0331 in compared to 26.00 mm / 1.0236 in on the Bach 4 — a difference of 0.24 mm / 0.0094 in. A wider cup generally produces a fuller, darker tone but requires more air support.

How does cup depth compare between Bach 4 and Schilke 53?

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

Bach 4 vs Schilke 53

Name: Schilke 53
Brand: Schilke

The Schilke 53 has a wider cup diameter, the Schilke 53 has a larger throat opening.

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

The narrowest point at the bottom of the cup. Affects resistance, volume, and tone color.

Mouthpiece A

Bach 4

• Trombone

Throat diameter5.85 mm / 0.2303 in

Best suited for

📣High-volume projection — open throat for power

Mouthpiece B

Schilke 53

• Trombone

Throat diameter5.95 mm / 0.2343 in

Best suited for

📣High-volume projection — open throat for power

Throat Diameter

The Schilke 53 has a wider throat (5.95 mm / 0.2343 in vs 5.85 mm / 0.2303 in). A wider throat allows more air through, increasing volume and projection but reducing resistance.

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 4 details Schilke 53 details Bach 4 equivalents Schilke 53 equivalents

Bach 4 vs Schilke 53

Throat Diameter

Playing Characteristics

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What Changes If You Switch?

Which is better?

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