Trombones are typically valveless instruments that generate pitch by two means; the vibration of the mouthpiece and the length of the tubing. The most common trombone is the tenor trombone keyed to Bb, which has the same range as a standard baritone and euphonium. Tenor trombones are available keyed to other pitches, and can feature rotor systems that allow players to change pitch by altering the airflow of an instrument to a second, or sometimes third, set of tubing that is a different length than the instrument’s primary tubing.
Jean Baptiste offers the ST390 Tenor Trombone, designed with a small bore for an effortless playing experience, as well as the advanced ST490F F-Trigger Trombone, featuring a large bore and a second set of tubing (keyed to F) for extended range.
The VT481B (keyed to Bb) and VT480C (keyed to C) Valve Trombones, which can be classified as tenor trumpets, are located in the Speciality/Harmony section.