GR Technologies E62FD vs Schilke 6F4
The Schilke 6F4 has a wider cup diameter, the GR Technologies E62FD features a deeper cup.
Mouthpiece A
GR Technologies E62FD
• Flugelhorn
Cup diameter15.75 mm / 0.6201 in
Cup depthDeep
Rim width—
Throat diameter—
Backbore—
Finish—
Material—
vs
Mouthpiece B
Schilke 6F4
• Flugelhorn
Cup diameter15.99 mm / 0.6295 in
Cup depthMedium
Rim width—
Throat diameter—
Backbore24.1520"
Finish—
Material—
Cup Diameter
The Schilke 6F4 has a cup diameter of 15.99 mm / 0.6295 in compared to 15.75 mm / 0.6201 in on the GR Technologies E62FD — a difference of 0.24 mm / 0.0094 in. A wider cup generally produces a fuller, darker tone but requires more air support.
Cup Depth
The GR Technologies E62FD has a deep cup while the Schilke 6F4 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.