Schilke 13D4 vs Schilke 13Heavyweight
the Schilke 13D4 has a larger throat opening.
Mouthpiece A
Schilke 13D4
• Trumpet
Cup diameter16.89 mm / 0.6650 in
Cup depthMedium
Rim width—
Throat diameter3.66 mm / 0.1441 in
Backbore27
Finish—
Material—
vs
Mouthpiece B
Schilke 13Heavyweight
• Trumpet
Cup diameter16.89 mm / 0.6650 in
Cup depthMedium
Rim width—
Throat diameter3.65 mm / 0.1437 in
Backbore26
Finish—
Material—
Cup Diameter
Both mouthpieces have virtually identical cup diameters at 16.89 mm / 0.6650 in.
Cup Depth
Both mouthpieces share a medium cup depth, so the sound character from depth alone will be very similar.
Throat Diameter
The Schilke 13D4 has a wider throat (3.66 mm / 0.1441 in vs 3.65 mm / 0.1437 in). A wider throat allows more air through, increasing volume and projection but reducing resistance.
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.