The Michael Rath R90 contrabass trombone was introduced in 2005 as a natural extension of our bass trombones and consequently it has a familiar feel.
Bass trombonists, especially those playing our R8 or R9 bass trombones, have found adjusting to the R90 contrabass trombone to be a relatively simple process.
Swiss designed Hagmann valves with heavy valve caps are supplied on the R90 and the instrument has a standard bore size of 0.578” and bell flare diameter of 10½”.
Similar to all Michael Rath Custom bass trombones, different valve tuning combinations are possible. Regular combinations, such as F/C/D, F/Eb/Bb or others, are possible by tuning extensions, supplied with each R90 contrabass trombone.