Giardinelli 5M vs Schilke 47C4
The Schilke 47C4 has a wider cup diameter, the Giardinelli 5M has a larger throat opening.
The internal diameter of the cup, measured at the widest point inside the rim.
Mouthpiece A
Giardinelli 5M
• Trombone
Cup diameter25.00 mm / 0.9843 in
Best suited for
High-volume projection — open throat for power
vs
Mouthpiece B
Schilke 47C4
• Trombone
Cup diameter25.10 mm / 0.9882 in
Best suited for
High-volume projection — open throat for power
Cup Diameter
The Schilke 47C4 has a cup diameter of 25.10 mm / 0.9882 in compared to 25.00 mm / 0.9843 in on the Giardinelli 5M — a difference of 0.10 mm / 0.0039 in. A wider cup generally produces a fuller, darker tone but requires more air support.
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.
Compare Giardinelli 5M with others
Compare Schilke 47C4 with others
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