Miraphone 691
Bb large-bore bass trombone · professional · current
Bb bass slide trombone, open wrap, dependent F/Gb double rotor
| Type | bass |
|---|---|
| Key | Bb |
| Bore class | large |
| Bore size | .563″ |
| Valve configuration | Double valves (dependent) |
| Valves | 2 |
| Rotor type | traditional rotary |
| Wrap | open wrap |
| Bell diameter | 9.84″ |
| Bell material | yellow brass |
| Finish | clear lacquer |
| Level | professional |
| Era | current |
| Country | Germany |
Features: Open wrap; F/Gb dependent double rotor; nickel silver trim; A=443 Hz. In current catalog dropdown but no current price shown
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