The Warburton system facilitates the brass player's choosing of a rim diameter, cup style and depth, with a backbore to best balance his/her sound and resistance. This choice ultimately affords one the most efficient mouthpiece with which to perform in any given playing situation. This two-piece system consists of fully interchangeable "TOP" sections and "BACKBORE" sections. Due to the multiplicity of demands placed upon the modern brass player, the various cup designs have been chosen for ability to produce the most desired sound in any playing idiom. The backbore sizes compliment the cup designs and further assist in the refinement and "fine-tuning" of the sound. Consideration has been given even to the placement of the backbore into the receiver (amount of gap). The Warburton system allows the player the opportunity to personally "balance" their equipment.