Schilke 44E4 vs Schilke 45
The Schilke 45 has a wider cup diameter, the Schilke 44E4 features a deeper cup.
The internal diameter of the cup, measured at the widest point inside the rim.
Mouthpiece A
Schilke 44E4
• Trombone
Cup diameter24.28 mm / 0.9559 in
Best suited for
Orchestral playing — large cup for full, dark tone
High-volume projection — open throat for power
vs
Mouthpiece B
Schilke 45
• Trombone
Cup diameter24.38 mm / 0.9598 in
Best suited for
High-volume projection — open throat for power
Cup Diameter
The Schilke 45 has a cup diameter of 24.38 mm / 0.9598 in compared to 24.28 mm / 0.9559 in on the Schilke 44E4 — 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.