Bob Reeves Trumpet Mouthpiece Underparts contain the cup, bore, and shank. Each is designed to create a different sound, and is optimized for a different playing style. The standard #2 backbore works well with any cup.
Standard #2 Backbore - The second backbore made by Bob Reeves, it is similar to a Bach #10. It plays with excellent tone color and intonation
B cup - Deep cylindrical bowl similar to a Bach 7B
C cup - Medium-deep bowl similar to a Bach 3C
D cup - Medium-deep conical bowl
ES cup - Extra shallow bowl
M cup - Medium bowl
S cup - Shallow bowl
SV cup - Very shallow conical "V" shape
V cup - Very deep conical bowl
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