Detail 01
Large shank
Fits large-bore tenor and bass trombone receivers only. A small-bore horn needs the 6BS instead.

Independent shopping perspective
Denis Wick HeavyTop trombone mouthpiece, 6BL cut. Large shank, shallow-ish cup, V-throat — built for players who live in the upper register.

Strong match
Consider the trade-offs
What matters in use
Catalog numbers tell only part of the story. These are the details most likely to change how this product feels, sounds, or fits into a setup.
Detail 01
Fits large-bore tenor and bass trombone receivers only. A small-bore horn needs the 6BS instead.
Detail 02
On the narrow side for trombone. Less lip inside the rim means easier high notes, thinner low register.
Detail 03
Tighter than the 7.30mm on deeper models. More resistance, more back-pressure, easier to control soft high playing.
Detail 04
Funnel shape adds edge and projection compared with a barrel backbore. Sound carries through a loud section.
Detail 05
Narrow rim. Sharper feel on the lip, more flexibility for slurs and range, less cushion on long gigs.
Detail 06
Extra metal at the rim adds resistance and stability; slotting feels firmer and the core of the note tightens.
Final check
Product questions
Straight answers to the questions shoppers most often ask about this product.
No. This is the large-shank 6BL. Denis Wick makes the 6BS in small shank with the same 25.40mm cup and 6.66mm throat if you need the small-bore version.
It leans commercial and lead — crisp, clear, strong high register. For orchestral tenor work the 5AL, with its deeper cup and barrel backbore, is the more usual choice.
The added mass around the rim and cup increases resistance and stability. Notes slot more firmly and the tone core tightens. Same cup dimensions, different feel.
The shank will fit many large-shank euphoniums, but the cup is small and bright for euphonium. The 4AL cup is the classic euphonium size in this line.
Reference
The complete catalog record, organized around the decisions musicians make when comparing gear.