Vincent Bach LT50B3LOG double-rotor bass trombone

£6,900.00

Ref: LT50B3L0G

1 in stock

The Bach Stradivarius 50B3LO is a double-rotor bass trombone with a large 10½-inch bell, and open wrap F and G-flat attachments which can be accessed independently using two standard in-line rotary valves.

The LT50B3LOG variant has a gold brass bell and nickel-silver lightweight hand slide.

Note: model pictured is 50B3LO standard model.

Lacquer finish
Bore size: 0.562 in. (14.27 mm)
Key of B-flat/F/G-flat
10½-inch gold brass bell
Double inline/independent traditional rotary valves
Lightweight nickel-silver hand slide
Open wrap
Woodshell case

Along with a larger bore and bell diameter, bass trombones are often equipped with a second rotor to extend their low register. There are two double-rotor systems: ‘independent’ and ‘dependent’. An independent system has both rotors sitting side-by-side (or ‘inline’) on the neck-pipe, where they can function alone or in tandem. Dependent models locate the second rotor on the F attachment rather than the neck-pipe, hence the alternative descriptors ‘stacked’ or ‘offset’. In this configuration, use of the second rotor depends on the first rotor being simultaneously engaged.

Wrap/valve	Bell diameter (inches)
Wrap/valve	9½	10½
Closed / standard	50B3	50B3L
Open / standard	50B3O	50B3LO^†
Open / Hagmann*	50A3	50A3L^‡
Open / ‘Infinity’ axial-flow	50AF3	50AF3L

Other model variants: ^†LT50B3LOG ^‡LT50A3LG

*The Hagmann free-flow valve appeared in the early 1990s as a further development away from the traditional rotary valve, following the introduction of the more complex Thayer axial-flow valve in the 1980s. The Hagmann design minimises distortion of the air flow inside the valve, resulting in a rich, full sound, and is easy to maintain using regular valve oil. Vincent Bach introduced the Hagmann valve into their Stradivarius trombone range in 1999.

Manufacturer’s website: conn-selmer.eu