GR Technologies 67FD vs Schilke 16F4
The Schilke 16F4 has a wider cup diameter, the GR Technologies 67FD features a deeper cup.
Mouthpiece A
GR Technologies 67FD
• Flugelhorn
Cup diameter17.00 mm / 0.6693 in
Cup depthDeep
Rim width—
Throat diameter—
Backbore—
Finish—
Material—
Best suited for
Orchestral playing — large cup for full, dark tone
vs
Mouthpiece B
Schilke 16F4
• Flugelhorn
Cup diameter17.20 mm / 0.6772 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
Cup Diameter
The Schilke 16F4 has a cup diameter of 17.20 mm / 0.6772 in compared to 17.00 mm / 0.6693 in on the GR Technologies 67FD — a difference of 0.20 mm / 0.0079 in. A wider cup generally produces a fuller, darker tone but requires more air support.
Cup Depth
The GR Technologies 67FD has a deep cup while the Schilke 16F4 has a medium cup. Deeper cups favor a darker, richer sound; shallower cups provide more brightness and easier upper register.
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.