Schilke 13F4 vs Yamaha FH-14F4
the Yamaha FH-14F4 has a larger throat opening.
Mouthpiece A
Schilke 13F4
• Flugelhorn
Cup diameter16.76 mm / 0.6598 in
Cup depthMedium
Rim width—
Throat diameter3.86 mm / 0.1520 in
Backbore24 .1520"
Finish—
Material—
Best suited for
High-volume projection — open throat for power
vs
Mouthpiece B
Yamaha FH-14F4
• Flugelhorn
Cup diameter16.76 mm / 0.6598 in
Cup depthMedium
Rim width—
Throat diameter4.30 mm / 0.1693 in
BackboreStandard
Finish—
Material—
Best suited for
High-volume projection — open throat for power
Cup Diameter
Both mouthpieces have virtually identical cup diameters at 16.76 mm / 0.6598 in.
Cup Depth
Both mouthpieces share a medium cup depth, so the sound character from depth alone will be very similar.
Throat Diameter
The Yamaha FH-14F4 has a wider throat (4.30 mm / 0.1693 in vs 3.86 mm / 0.1520 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.