Which has a bigger cup — Schilke 38D or Yamaha AH-37C4?

The Schilke 38D has a cup diameter of 19.73 mm / 0.7768 in compared to 18.60 mm / 0.7323 in on the Yamaha AH-37C4 — 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 Schilke 38D and Yamaha AH-37C4?

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

Schilke 38D vs Yamaha AH-37C4

Name: Yamaha AH-37C4
Brand: Yamaha

The Schilke 38D has a wider cup diameter.

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

Schilke 38D

• Baritone / Euphonium

Backbore—

Mouthpiece B

Yamaha AH-37C4

• Baritone / Euphonium

BackboreStandard

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.