Which has a bigger cup — Denis Wick 6BL or Denis Wick 9BL?

The Denis Wick 6BL has a cup diameter of 25.40 mm / 1.0000 in compared to 25.00 mm / 0.9843 in on the Denis Wick 9BL — a difference of 0.40 mm / 0.0157 in. A wider cup generally produces a fuller, darker tone but requires more air support.

How does cup depth compare between Denis Wick 6BL and Denis Wick 9BL?

Both mouthpieces share a medium cup depth, so the sound character from depth alone will be very similar.

Denis Wick 6BL vs Denis Wick 9BL

Name: Denis Wick 9BL
Brand: Denis Wick

The Denis Wick 6BL has a wider cup diameter.

Overall Comparison Cup Diameter Cup Depth Rim Width Throat Diameter Backbore Finish Material

The width of the rim surface that contacts the lips. Wider rims improve endurance; narrower rims improve flexibility.

Mouthpiece A

Denis Wick 6BL

• Trombone

Rim width6.26 mm / 0.2465 in

Best suited for

📣High-volume projection — open throat for power

Mouthpiece B

Denis Wick 9BL

• Trombone

Rim width6.46 mm / 0.2543 in

Best suited for

📣High-volume projection — open throat for power

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.