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

Mouthpiece A

GR Technologies 63Z**

• Trumpet

Rim width—

Best suited for

🎺Lead / commercial — shallow cup for brightness and range

Mouthpiece B

Yamaha TR-14B4

• 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.

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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What Changes If You Switch?

Which is better?

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