Adams TBB1 double rotor bass trombone

Ex-demonstration stock: click here.

The TBB1 bass trombone combines double independent Rene Hagmann GEN II® valves with superb quality Adams craftmanship. The hand-hammered bell has a warm, rich sound in all registers. Large bore and open wrap attachments give sparkling clarity and excellent projection, and the nickel silver slide responds effortlessly in any situation. An excellent choice for both the symphonic and band musician.

• Lacquer finish
• Bore size: 0.562 in. (14.30 mm)
• Key: B-flat/F/G-flat/D
• 10-inch (254 mm) yellow brass bell
• Double independent Hagmann* GEN II® rotors
• Open wrap F/G-flat attachments
• Nickel silver outer slide

* 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.

Also available:
TBB1GB gold brass bell

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.

Manufacturer’s website: adams-music.com