Which has a bigger cup — Kelly 25 or Schilke S-H?

The Schilke S-H has a cup diameter of 31.84 mm / 1.2535 in compared to 30.99 mm / 1.2201 in on the Kelly 25 — a difference of 0.85 mm / 0.0335 in. A wider cup generally produces a fuller, darker tone but requires more air support.

How does cup depth compare between Kelly 25 and Schilke S-H?

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

Kelly 25 vs Schilke S-H

Name: Schilke S-H
Brand: Schilke

The Schilke S-H 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

Kelly 25

• Tuba

General

BackboreM

Best suited for

📋General tuba / euphonium doubler

Mouthpiece B

Schilke S-H

• Tuba

BackboreM.295"

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.