Backbore Models XXX - The “Triple X” backbore will give you a tight core to the notes with greater projection and a slightly brighter sound than the XXF backbore. This is our benchmark backbore for lead players and rockers. This backbore lets your sound project further with less effort. XXF - The “XXF” backbore was designed for players who demand a more traditional sound! The XXF backbore lets you move more air than our XXX backbore, giving the player a more robust traditional sound while maintaining a bright and powerful upper register. XXD - The “XXD” backbore was designed for players who demand an even darker traditional sound! The XXD backbore allows the sound to roll off the end of the bell creating a wider darker sound than our XXF backbore.

Ships in 10-21 days. Sometimes sooner.

If ordering first time. You must also order a top as this is a 2 piece mouthpiece.