Denis Wick 6BL vs Kelly 6-1/2AL
The Denis Wick 6BL has a wider cup diameter, the Kelly 6-1/2AL features a deeper cup.
Cup Diameter
The Denis Wick 6BL has a cup diameter of 25.40 mm compared to 25.15 mm on the Kelly 6-1/2AL — a difference of +0.25 mm. A wider cup generally produces a fuller, darker tone but requires more air support.
Cup Depth
The Kelly 6-1/2AL has a very deep cup while the Denis Wick 6BL has a medium cup. Deeper cups favor a darker, richer sound; shallower cups provide more brightness and easier upper register.
Material
The Denis Wick 6BL is described as unspecified, and the Kelly 6-1/2AL as Lexan polycarbonate. 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 Denis Wick 6BL with others
Compare Kelly 6-1/2AL with others
Popular Trombone comparisons
- Yamaha SL-YEO-S vs Marcinkiewicz ET3C. Loper
- Giardinelli Sym. T vs Bach 12E
- Bach 12E vs Bob Reeves 5G Gladstone
- Schilke 45B vs Marcinkiewicz ET3C. Loper
- Denis Wick 6BL vs Conn Connstellation 7CW
- Bach 12E vs Bach Mega Tone Trombone 6½A
- Yamaha SL-48DL vs Yamaha SL-YEO-S
- Conn Connstellation 7CW vs Bach 6½A (small shank)