Detail 01
5.5-inch one-piece bell and heavy chassis
These are central elements of the A4’s heavier build.

Independent shopping perspective
The Adams A4 is a professional Bb trumpet developed through collaboration between Adams’ design staff and performing artist Amik Guerra. Its 5.5-inch one-piece bell and heavy chassis place it among Adams’ heavier models, with a rich, warm, fluid, and thick-sounding voice. The design is aimed at soloists needing warmth with articulation, while its coloring and richness are also described as blending readily in a section across different musical environments.

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
These are central elements of the A4’s heavier build.
Detail 02
This is the larger bore most commonly ordered for the A4.
Detail 03
A 11.7 mm bore version is available by request.
Final check
Product questions
Straight answers to the questions shoppers most often ask about this product.
Most orders use the larger .470-inch, or 12 mm, bore.
Yes. A .460-inch, or 11.7 mm, bore instrument is available by request.
No. It is one of Adams’ heavier trumpet models and uses a heavy chassis.