Bach 5C Flugel vs Giardinelli 3FL
The Giardinelli 3FL has a wider cup diameter, the Giardinelli 3FL features a deeper cup.
Mouthpiece A
Bach 5C Flugel
• Flugelhorn
Cup diameter16.25 mm / 0.6398 in
Cup depthMedium
Rim width—
Throat diameter3.99 mm / 0.1571 in
Backbore—
Finish—
Material—
Best suited for
All-round versatile — balanced cup for general playing
High-volume projection — open throat for power
vs
Mouthpiece B
Giardinelli 3FL
• Flugelhorn
Cup diameter17.00 mm / 0.6693 in
Cup depthVery deep
Rim width—
Throat diameter—
Backbore—
Finish—
Material—
Best suited for
Orchestral playing — large cup for full, dark tone
Cup Diameter
The Giardinelli 3FL has a cup diameter of 17.00 mm / 0.6693 in compared to 16.25 mm / 0.6398 in on the Bach 5C Flugel — a difference of 0.75 mm / 0.0295 in. A wider cup generally produces a fuller, darker tone but requires more air support.
Cup Depth
The Giardinelli 3FL has a very deep cup while the Bach 5C Flugel 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.