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

Base metal or construction (e.g. brass, stainless steel, plastic). Influences weight, response, and tone color.

Mouthpiece A

Bob Reeves 11C

• Trombone

Material—

Mouthpiece B

Schilke 45B

• Trombone

Material—

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.