Denis Wick 6BL vs Giardinelli 4M
the Denis Wick 6BL has a larger throat opening.
The narrowest point at the bottom of the cup. Affects resistance, volume, and tone color.
Mouthpiece A
Denis Wick 6BL
• Trombone
Throat diameter6.66 mm / 0.2622 in
Best suited for
High-volume projection — open throat for power
vs
Mouthpiece B
Giardinelli 4M
• Trombone
Throat diameter6.40 mm / 0.2520 in
Best suited for
High-volume projection — open throat for power
Throat Diameter
The Denis Wick 6BL has a wider throat (6.66 mm / 0.2622 in vs 6.40 mm / 0.2520 in). A wider throat allows more air through, increasing volume and projection but reducing resistance.
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.