Detail 01
Cup mute
The cup over the bell rolls off the top end, giving a softer, more covered sound than a straight mute.

Independent shopping perspective
A cup mute for tenor trombone. Standard section gear for big band and pit book parts that call for cup.

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
The cup over the bell rolls off the top end, giving a softer, more covered sound than a straight mute.
Detail 02
Sized to a tenor bell. It will not seat correctly in a bass trombone or a small-bore alto.
Detail 03
Corks hold it in the bell by friction. Seating depth changes both pitch and how much sound gets out.
Detail 04
The cup gap is fixed rather than adjustable, so the tone is consistent but you cannot dial it in.
Detail 05
Cheap enough to keep as a spare in the case rather than the only cup mute you own.
Final check
Product questions
Straight answers to the questions shoppers most often ask about this product.
No. It is built for a tenor bell. A bass trombone bell is wider and needs a bass-size cup mute.
Yes. Mutes generally push the horn sharp, more so in the upper register. Pull the slide out and check pitch with the mute in.
The cup covers the bell, so highs come off and the sound is softer and darker. A straight mute stays brighter and more cutting.
The corks need a snug fit against your bell. Seat it with a slight twist, and sand or replace worn corks once they compress.