Schilke 14A4 vs Schilke 15A4AHeavyweight
The Schilke 15A4AHeavyweight has a wider cup diameter.
Mouthpiece A
Schilke 14A4
• Trumpet
Cup diameter17.09 mm / 0.6728 in
Cup depthMedium
Rim width—
Throat diameter3.66 mm / 0.1441 in
Backbore27
Finish—
Material—
vs
Mouthpiece B
Schilke 15A4AHeavyweight
• Trumpet
Cup diameter17.14 mm / 0.6748 in
Cup depthMedium
Rim width—
Throat diameter3.66 mm / 0.1441 in
Backbore27
Finish—
Material—
Cup Diameter
The Schilke 15A4AHeavyweight has a cup diameter of 17.14 mm / 0.6748 in compared to 17.09 mm / 0.6728 in on the Schilke 14A4 — a difference of 0.05 mm / 0.0020 in. A wider cup generally produces a fuller, darker tone but requires more air support.
Cup Depth
Both mouthpieces share a medium cup depth, so the sound character from depth alone will be very similar.
Throat Diameter
Throat diameters are essentially identical at 3.66 mm / 0.1441 in, so resistance feel will be comparable.
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.