Courtois AC550 Legend 550
Bb/F/Gb/D large-bore bass trombone · professional · current
Uniform blow, easy response and clarity through the valve registers
| Type | bass |
|---|---|
| Key | Bb/F/Gb/D |
| Bore class | large |
| Bore size | .562″ |
| Valve configuration | Double valves (independent / inline) |
| Valves | 2 |
| Rotor type | Hagmann |
| Wrap | open wrap |
| Bell diameter | 9.50″ |
| Bell material | yellow brass |
| Bell construction | hand hammered one piece interchangeable |
| Slide | brass outer slide with nickel silver sleeves, double-radius brass bottom bow, hard-chrome nickel-plated inner slide |
| Leadpipe | interchangeable |
| Finish | clear lacquer |
| Level | professional |
| Era | current |
| Country | France |
Features: Two independent inline René Hagmann free-flow valves with progressive bore; interchangeable one-piece bells. Bell 9.5in (AC550BH/BHR) or 10.5in (AC550BHL/BHLR), yellow or gold brass — collapsed to one model.
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