Trombone Backbores

Trombone Backbores

  • $95.00
    Unit price per 

The WARBURTON system facilitates the brass player's choosing of a mouthpiece with the optimum combination of rim diameter, cup style and depth, and backbore. This unique ability allows a player to fit together a mouthpiece that will best balance sound and resistance with his own instrument. The choices available with the WARBURTON system will afford one the most efficient mouthpiece with which to perform in any given playing situation.



  • Bore .250".
  • The T series is the standard for Tenor trombone.
  • They are numbered from 1 to 6, with 1 being the smallest and 6 the largest.


  • Bore .250".
  • The T* (STAR) series is the same as the T series except that there is no cylindrical section.
  • The T* models are somewhat more free blowing than the standard models.


  • Bore .266".
  • There are 3 models for the ST backbores.
  • They are numbered from 1 to 3, with 1 being the smallest.
  • It is worth noting that these models were designed for the large tenor; it is not just a tenor backbore with a large shank.


  • Bore .281".
  • The three B backbores fully complement the Bass cups in providing a full sound that is rich in harmonic overtones.
  • Number 1 is the smallest and 3 the largest.
NOTE - ST and B backbores are also available to fit Old Conn 88 and 72 models and Boosey & Hawkes euphoniums.