Which has a bigger cup — Bob Reeves 5G or Yamaha SL-48S-GP?

The Bob Reeves 5G has a cup diameter of 25.55 mm / 1.0059 in compared to 25.25 mm / 0.9941 in on the Yamaha SL-48S-GP — a difference of 0.30 mm / 0.0118 in. A wider cup generally produces a fuller, darker tone but requires more air support.

How does cup depth compare between Bob Reeves 5G and Yamaha SL-48S-GP?

The Bob Reeves 5G has a deep cup while the Yamaha SL-48S-GP has a medium cup. Deeper cups favor a darker, richer sound; shallower cups provide more brightness and easier upper register.

Bob Reeves 5G vs Yamaha SL-48S-GP

Name: Yamaha SL-48S-GP
Brand: Yamaha

The Bob Reeves 5G has a wider cup diameter, the Bob Reeves 5G 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 5G

• Trombone

Material—

Best suited for

🎻Orchestral playing — large cup for full, dark tone

Mouthpiece B

Yamaha SL-48S-GP

• 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.

Open in interactive tool + Add third mouthpiece Bob Reeves 5G details Yamaha SL-48S-GP details Bob Reeves 5G equivalents Yamaha SL-48S-GP equivalents

Bob Reeves 5G vs Yamaha SL-48S-GP

Playing Characteristics

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