Which has a bigger cup — Yamaha TR-11B4-GP or Yamaha TR-13B4?

The Yamaha TR-13B4 has a cup diameter of 16.63 mm / 0.6547 in compared to 16.46 mm / 0.6480 in on the Yamaha TR-11B4-GP — a difference of 0.17 mm / 0.0067 in. A wider cup generally produces a fuller, darker tone but requires more air support.

How does cup depth compare between Yamaha TR-11B4-GP and Yamaha TR-13B4?

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

Yamaha TR-11B4-GP vs Yamaha TR-13B4

Name: Yamaha TR-13B4
Brand: Yamaha

The Yamaha TR-13B4 has a wider cup diameter.

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

Surface plating or treatment (e.g. silver plate, gold trim). Affects feel, durability, and appearance.

Mouthpiece A

Yamaha TR-11B4-GP

• Trumpet

Finish—

Mouthpiece B

Yamaha TR-13B4

• Trumpet

Finish—

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.