Willson 551TA
Bb / F / Gb large-bore bass trombone · professional · current
OpenWrap independent double-valve Bb/F/Gb bass trombone
| Type | bass |
|---|---|
| Key | Bb / F / Gb |
| Bore class | large |
| Bore size | .562″ |
| Valve configuration | Double valves (independent / inline) |
| Valves | 2 |
| Rotor type | ROTAX |
| Wrap | open wrap |
| Bell diameter | 10.43″ |
| Bell material | yellow brass or red brass |
| Slide | nickel silver (outer), chromium-coated (inner) |
| Finish | clear lacquer or silver plate |
| Level | professional |
| Era | current |
| Country | Switzerland |
Features: OpenWrap independent; 2 ROTAX rotors with Rotohead system; compensated flow geometry; adjustable joint system; new slide-stop design; slide can be dismounted or soldered
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