The Conn 88H is probably the most widely played professional B-flat/F symphonic trombone. This large bore instrument offers outstanding clarity and projection, and the playing slide has a smooth, quick action.
The 88HTO model features a thin wall bell and open wrap F attachment. The rose brass used for both the bell and playing slide produces a warm, resonant sound.
| F attachment/valve | Bell material | ||
|---|---|---|---|
| Rose brass | Yellow brass | Thin rose brass | |
| Closed wrap/traditional | 88H | 88HY | 88HT |
| Open wrap/traditional | 88HO | 88HNV | 88HYO | 88HTO |
| Open wrap/CL2000 | 88HCL | 88HYCL | 88HTCL |
The ‘88H’ was introduced in 1954 by C.G. Conn of Elkhart, Indiana, as part of the expansion of their 8H large-bore trombone design. Featuring a .547-inch bore, 8½-inch rose brass bell, and F-attachment, its broad, warm orchestral sound matched the evolving tonal requirements of American orchestras, and helped standardize the modern large-bore symphonic setup. Many variants—open-wrap configurations, alternative bell materials, and artist collaborations—followed. Despite corporate transitions, the 88H remains a benchmark of orchestral trombone construction worldwide in the twenty-first century.
Manufacturer’s website: conn-selmer.eu