Which has a bigger cup — Bob Reeves 11C or Schilke 45B?

The Bob Reeves 11C has a cup diameter of 24.80 mm / 0.9764 in compared to 24.30 mm / 0.9567 in on the Schilke 45B — a difference of 0.50 mm / 0.0197 in. A wider cup generally produces a fuller, darker tone but requires more air support.

How does cup depth compare between Bob Reeves 11C and Schilke 45B?

The Schilke 45B has a medium cup while the Bob Reeves 11C has a shallow cup. Deeper cups favor a darker, richer sound; shallower cups provide more brightness and easier upper register.

Bob Reeves 11C vs Schilke 45B

Name: Schilke 45B
Brand: Schilke

The Bob Reeves 11C has a wider cup diameter, the Schilke 45B features a deeper cup.

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

Bob Reeves 11C

• Trombone

Backbore—

Mouthpiece B

Schilke 45B

• Trombone

Backbore15/64 .2344"

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.