Conn 40H Roaring 20’s Jazz Trombone – T.I.S. Model c.1928
This Conn 40H is a classic “Tuning-In-Slide” (T.I.S.) jazz trombone dating back to the late 1920s—serial number 254910 places it around 1928. Built during the roaring jazz age, this model was designed for maximum projection and tonal brilliance in live acoustic settings. It features a 7" bell in satin silver with a gold-wash inner bell, producing a lively sound ideal for traditional jazz, Dixieland, or brass band playing.
The T.I.S. design means there is no tuning slide in the bell section—the tuning mechanism is built into the handslide itself. This adds a bit of weight and resistance to the slide, giving the player added presence and energy, especially in acoustic settings. It also helps the tone carry exceptionally well through a mic.
This example has been serviced in-house with a chemical cleaning and full inspection. It’s not the cleanest or most pristine 40H we’ve had, but it’s a solid player and very presentable. It’s a great option for someone who wants to explore this classic style of horn without paying top-dollar collector prices. The original case is included, though it shows its age.
Takes a small shank mouthpiece—one is included.
This horn is now part of our sold Archive, available as a reference for jazz players, collectors, or anyone interested in the legacy of early Conn craftsmanship.
What is a trombone with T.I.S. tuning?
T.I.S. (Tuning in Slide) is an older design where the tuning mechanism is placed in the handslide rather than in the bell section. This was common in trombones from the early 1900s. While it fell out of favor for a time, modern players have begun revisiting T.I.S. designs in recent decades. In fact, Greenhoe currently offers a T.I.S. configuration on their GC5 bass trombone models. See Greenhoe’s GC5 T.I.S. Series
