Giardinelli 4M vs Schilke 52D
The Schilke 52D has a wider cup diameter, the Schilke 52D features a deeper cup, the Giardinelli 4M has a larger throat opening.
The internal diameter of the cup, measured at the widest point inside the rim.
Mouthpiece A
Giardinelli 4M
• Trombone
Cup diameter25.40 mm / 1.0000 in
Best suited for
High-volume projection — open throat for power
vs
Mouthpiece B
Schilke 52D
• Trombone
Cup diameter25.78 mm / 1.0150 in
Best suited for
Orchestral playing — large cup for full, dark tone
High-volume projection — open throat for power
Cup Diameter
The Schilke 52D has a cup diameter of 25.78 mm / 1.0150 in compared to 25.40 mm / 1.0000 in on the Giardinelli 4M — a difference of 0.38 mm / 0.0150 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.