David Butler C12
Bb dual-bore bass trombone · professional · current
Ultra-light carbon-fiber bass trombone with double independent rotary valves
| Type | bass |
|---|---|
| Key | Bb |
| Bore class | dual |
| Bore size | .562/.578″ |
| Valve configuration | Double valves (independent / inline) |
| Valves | 2 |
| Rotor type | traditional rotary |
| Bell diameter | 9.5″ |
| Bell material | carbon fiber |
| Bell construction | carbon fiber; optional threaded two-piece bell |
| Slide | carbon fiber outer hand slide (80g) |
| Leadpipe | interchangeable |
| Finish | raw |
| Weight | 4 lbs |
| Level | professional |
| Era | current |
| Country | USA |
| Price (MSRP) | $7,100 |
Features: Boutique/custom carbon-fiber maker; double independent Instrument Innovations rotary valves with ball bearings (no lapping required); CF/nylon 3D-printed hand grip; Speedyflo water key; two CF leadpipes (short/long, coarse or fine threads); optional threaded two-piece bell (+$350); half-stroke pressure venting
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