The Symphonic Series uses the Classic Series cup designs and opens up the throat and backbore negating the need to have a Classic Mouthpiece reamed by hand which can create inconsistencies in playability and tone. Symphonic Series mouthpieces are completely made on CNC machines creating a precise mouthpiece every time.
Currently only stocked with 24 backbore and throat. Other throat options available to order.
Backbore - No. #24 bigger, darker, symphonic
Throat - No. #24, 3.86mm (.152”)
For years trumpeters have gotten their Bach mouthpieces bored-out, especially for use on C trumpets. Bach now make these in-house on their CNC mechines for precise and consistent manufacture.