Conn 112H double rotor bass trombone

A model introduced in the 1980s, the Conn 112H is ideal for both symphonic and solo performance. It has a 10-inch bell producing a deep, warm and resonant sound, and inline independent rotors to access the open-wrap F and G-flat attachments.

• Lacquer finish
• Rose brass bell
• Bore size: 0.562 in. (14.30 mm)
• Bell diameter: 10 in. (254 mm)
• Two independent/inline traditional rotary valves
• Open wrap F/G-flat attachments
• Sprung water key
• 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.

Manufacturer’s website: conn-selmer.eu