Which has a bigger cup — GR Technologies 63Z** or Schilke 13A4a?

The Schilke 13A4a has a cup diameter of 16.76 mm / 0.6598 in compared to 16.00 mm / 0.6299 in on the GR Technologies 63Z** — a difference of 0.76 mm / 0.0299 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 Schilke 13A4a?

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

GR Technologies 63Z** 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 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

Schilke 13A4a

• Trumpet

Throat diameter3.66 mm / 0.1441 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 Schilke 13A4a details GR Technologies 63Z** equivalents Schilke 13A4a equivalents

GR Technologies 63Z** vs Schilke 13A4a

Playing Characteristics

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