Bach 5A Flugel vs Giardinelli 17FL
The Bach 5A Flugel has a wider cup diameter.
Mouthpiece A
Bach 5A Flugel
• Flugelhorn
Cup diameter16.25 mm / 0.6398 in
Cup depthVery deep
Rim width—
Throat diameter3.99 mm / 0.1571 in
Backbore—
Finish—
Material—
Best suited for
High-volume projection — open throat for power
vs
Mouthpiece B
Giardinelli 17FL
• Flugelhorn
Cup diameter15.00 mm / 0.5906 in
Cup depthVery deep
Rim width—
Throat diameter—
Backbore—
Finish—
Material—
Cup Diameter
The Bach 5A Flugel has a cup diameter of 16.25 mm / 0.6398 in compared to 15.00 mm / 0.5906 in on the Giardinelli 17FL — a difference of 1.25 mm / 0.0492 in. A wider cup generally produces a fuller, darker tone but requires more air support.
Cup Depth
Both mouthpieces share a very deep cup depth, so the sound character from depth alone will be very similar.
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.