Which has a bigger cup — Bob Reeves 4G-5G or Schilke 45B?

The Bob Reeves 4G-5G has a cup diameter of 26.00 mm / 1.0236 in compared to 24.30 mm / 0.9567 in on the Schilke 45B — a difference of 1.70 mm / 0.0669 in. A wider cup generally produces a fuller, darker tone but requires more air support.

How does cup depth compare between Bob Reeves 4G-5G and Schilke 45B?

The Bob Reeves 4G-5G has a deep cup while the Schilke 45B has a medium cup. Deeper cups favor a darker, richer sound; shallower cups provide more brightness and easier upper register.

Bob Reeves 4G-5G vs Schilke 45B

Name: Schilke 45B
Brand: Schilke

The Bob Reeves 4G-5G has a wider cup diameter, the Bob Reeves 4G-5G features a deeper cup.

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

Bob Reeves 4G-5G

• Trombone

Throat diameter—

Best suited for

🎻Orchestral playing — large cup for full, dark tone

Mouthpiece B

Schilke 45B

• Trombone

Throat diameter5.95 mm / 0.2343 in

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.

Open in interactive tool + Add third mouthpiece Bob Reeves 4G-5G details Schilke 45B details Bob Reeves 4G-5G equivalents Schilke 45B equivalents

Bob Reeves 4G-5G vs Schilke 45B

Playing Characteristics

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