Detail 01
.562-inch bore
forms part of the design described as producing a larger overall sound.

Independent shopping perspective
the atbb-450 is a bass trombone configured for school programs and advancing musicians. a .562-inch bore sends its larger overall sound through a 9.5-inch yellow-brass bell. the layout combines a standard leadpipe, inline traditional rotor, open-wrap f attachment, and well-weighted hand slide. it arrives with a premium nylon-polyfoam case and large-shank mouthpiece, and carries three-year warranty coverage.


Strong match
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
forms part of the design described as producing a larger overall sound.
Detail 02
projects the instrument’s larger overall sound.
Detail 03
defines the instrument’s valve and wrap configuration.
Product questions
Straight answers to the questions shoppers most often ask about this product.
it includes a premium nylon-polyfoam case and a large-shank mouthpiece.
the atbb-450 carries a three-year warranty.
Reference
The complete catalog record, organized around the decisions musicians make when comparing gear.