Kelly 6-1/2AL-SS vs Schilke 45B
The Kelly 6-1/2AL-SS has a wider cup diameter, the Kelly 6-1/2AL-SS features a deeper cup.
Cup Diameter
The Kelly 6-1/2AL-SS has a cup diameter of 25.15 mm compared to 24.30 mm on the Schilke 45B — a difference of +0.85 mm. A wider cup generally produces a fuller, darker tone but requires more air support.
Cup Depth
The Kelly 6-1/2AL-SS has a very deep cup while the Schilke 45B has a medium cup. Deeper cups favor a darker, richer sound; shallower cups provide more brightness and easier upper register.
Material
The Kelly 6-1/2AL-SS is described as 316 Surgical Stainless Steel, and the Schilke 45B as unspecified. Material affects mass, warmth, and how quickly the piece responds.
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 Kelly 6-1/2AL-SS with others
Compare Schilke 45B with others
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