Which has a bigger cup — GR Technologies 63Z** or Yamaha TR-14B4?

The Yamaha TR-14B4 has a cup diameter of 16.85 mm / 0.6634 in compared to 16.00 mm / 0.6299 in on the GR Technologies 63Z** — a difference of 0.85 mm / 0.0335 in. A wider cup generally produces a fuller, darker tone but requires more air support.

How does cup depth compare between GR Technologies 63Z** and Yamaha TR-14B4?

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

GR Technologies 63Z** vs Yamaha TR-14B4

Name: Yamaha TR-14B4
Brand: Yamaha

The Yamaha TR-14B4 has a wider cup diameter.

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

GR Technologies 63Z**

• Trumpet

Throat diameter—

Best suited for

🎺Lead / commercial — shallow cup for brightness and range

Mouthpiece B

Yamaha TR-14B4

• Trumpet

Throat diameter3.65 mm / 0.1437 in

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 GR Technologies 63Z** details Yamaha TR-14B4 details GR Technologies 63Z** equivalents Yamaha TR-14B4 equivalents

GR Technologies 63Z** vs Yamaha TR-14B4

Playing Characteristics

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