Used AR Resonance Trumpet Backbores

Pre-owned mouthpiece backbores from AR Resonance. These backbores are all in excellent condition with no plating loss or damage. Each top has been inspected and cleaned by Beverly Music and will be re-sanitized prior to shipping. 

Sizing:

AR Resonance backbores are available in 4 main sizes, Lead, S, M, and L, and are available in 2 throat sizes, 40 (4.0 mm) and 42 (4.2mm). 

Example: 40-L = 40 throat, L taper 

Please note that these are mouthpiece backbores, and require a compatible top in order to be used. AR Resonance backbores thread with AR Resonance, PickettBrass, Warburton, Greg Black, James R New, and Austin Custom Brass mouthpiece tops. Please contact us if you have any questions.

For best results, use a matching throat size on both top and backbore