Which has a bigger cup — Bob Reeves RP5 or Schilke 13A4a?

The Schilke 13A4a has a cup diameter of 16.76 mm / 0.6598 in compared to 16.47 mm / 0.6484 in on the Bob Reeves RP5 — a difference of 0.29 mm / 0.0114 in. A wider cup generally produces a fuller, darker tone but requires more air support.

How does cup depth compare between Bob Reeves RP5 and Schilke 13A4a?

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

Bob Reeves RP5 vs Schilke 13A4a

Name: Schilke 13A4a
Brand: Schilke

The Schilke 13A4a has a wider cup diameter.

Overall Comparison Cup Diameter Cup Depth Rim Width Throat Diameter Backbore Finish Material

The width of the rim surface that contacts the lips. Wider rims improve endurance; narrower rims improve flexibility.

Mouthpiece A

Bob Reeves RP5

• Trumpet

Rim width—

Mouthpiece B

Schilke 13A4a

• Trumpet

Rim width—

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.