*Silver plated Medium-Large (ML) Shanks (the lower half of the backbore) are currently out of stock. We expect to have them ready to ship in June. Un-plated ML Shanks are available for shipping. Please email firstname.lastname@example.org if you have any questions.
Wedge two part backbores consist of an upper section, which can be regular or heavy weight, and a lower shank that can be of different lengths to adjust the gap, or for improving the pitch on a C trumpet. The two part systems provided great versatility in adjusting the backbore to your specific needs.
Small - Slightly larger than Schilke A backbore. Produces a compact lead sound with good upper register support
TT- Developed for endorsing artist Terry Townson. Intermediate in characteristics between Small and Medium backbore.
Medium - Similar to Warburton 7 or GR #2 backbore.
Medium-Large - Similar to Bach 10 backbore. This is an excellent all round backbore suitable for orchestral playing.
Engstrom ML-L - This is the signature backbore developed for Howard Engstrom of the Calgary Symphony Orchestra. It is intermediate between the ML and L backbore.
Large - This is our largest backbore, similar to a Bach 24. This produces a broad orchestral sound when paired with the appropriate top.
I have been searching for a way to improve my range and endurance. I finally decided that the Large Bore I was playing was just to big. I decided to move to the medium bore. I have not been disappointed. I have a more focused sound. I have improved range and endurance.