Detail 01
Large shank
Fits large-bore tenor and bass receivers only. Small-bore horns need the small-shank models like the 6BS or 9BS.

Independent shopping perspective
Large-shank trombone mouthpiece with a 27.11mm cup and open backbore. Bass-trombone sized, for players who want a rich low end that stays open up top.

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 receivers only. Small-bore horns need the small-shank models like the 6BS or 9BS.
Detail 02
Near the top of the range, just under the 0AL and 00AL. More lip vibrates, so the low register opens up and air demand rises.
Detail 03
Narrow for a cup this wide. Better flexibility and slotting, less cushion across a long rehearsal.
Detail 04
Wide bore passes air freely. Bigger sound and less resistance, but soft dynamics take more control.
Detail 05
Spreads and warms the tone instead of focusing it. Combined with the wide throat it favors volume over edge.
Detail 06
Slicker and warmer against the lip than silver, and it does not tarnish. Common choice if silver irritates your skin.
Final check
Product questions
Straight answers to the questions shoppers most often ask about this product.
The 27.11mm cup and large shank put it in bass trombone territory. Large-bore tenor players also use it when they want a darker, wider sound with more low-register weight.
The 2AL is slightly smaller at 27mm with a wider 6.73mm rim and a barrel backbore, giving a more focused traditional bass sound. The 1AL is more open in all registers.
Yes, if the receiver takes a large shank. Most large-bore tenors do. Small-bore horns will not accept it — those take the small-shank versions.
Plating affects feel and grip far more than tone. Gold is smoother and warmer to the touch than silver and will not tarnish. The cup, throat and backbore drive the sound.
Reference
The complete catalog record, organized around the decisions musicians make when comparing gear.