Bob Reeves 4G/JF vs Kelly 6-1/2AL-SS
The Bob Reeves 4G/JF has a wider cup diameter, the Kelly 6-1/2AL-SS features a deeper cup.
Cup Diameter
The Bob Reeves 4G/JF has a cup diameter of 26.00 mm compared to 25.15 mm on the Kelly 6-1/2AL-SS — 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 Bob Reeves 4G/JF has a deep cup. Deeper cups favor a darker, richer sound; shallower cups provide more brightness and easier upper register.
Material
The Bob Reeves 4G/JF is described as unspecified, and the Kelly 6-1/2AL-SS as 316 Surgical Stainless Steel. 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 Bob Reeves 4G/JF with others
Compare Kelly 6-1/2AL-SS with others
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