Denis Wick 4FL vs GR Technologies G66FD Radtke
The GR Technologies G66FD Radtke has a wider cup diameter, the Denis Wick 4FL features a deeper cup.
How deep the cup is, from shallow (brighter, easier high register) to deep (darker, fuller sound).
Mouthpiece A
Denis Wick 4FL
• Flugelhorn
Cup depthVery deep
Best suited for
High-volume projection — open throat for power
vs
Mouthpiece B
GR Technologies G66FD Radtke
• Flugelhorn
Cup depthDeep
Cup Depth
The Denis Wick 4FL has a very deep cup while the GR Technologies G66FD Radtke has a deep 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.