Reeves Brass Trumpet Mouthpiece Underpart Only

Each Bob Reeves Brass trumpet mouthpiece underpart is handcrafted and made to order using the same methods we’ve relied on for more than 50 years. These designs were shaped by the demands of leading studio, orchestral, and jazz artists, and built to the exacting standards that define our work.

This product includes the underpart only and does not include a rim.

Since Bob Reeves Brass mouthpieces use a screw-rim system, we need to know which rim this underpart is intended for so we can match the diameter correctly. Please provide your rim model when placing your order.

Choose your preferred cup, backbore, and shank style. Underparts come standard in silver plate, with optional 24k gold plating available for an additional charge

Rim Sizes (smallest diameter to largest):

• 40 - 40/64", .625", 15.875mm, 10-1/2C Mt. Vernon
• 41 - 41/64", .641", 16.28mm, 7C Mt. Vernon, 13A4a
• 42 - 42/64", .656, 16.66mm, 3C Elkhart, 14A4a
• 43 - 43/64", .672", 17.09mm, 3C, Shew Jazz
• 43N - 43/64", .672", 17.09mm, 2-1/2C
• 43W - 43/64", .672", 17.09mm, 3CW
• 43.5 - 43.5/64", .680", 17.27mm, 1-1/2C, 5C

Cup Shapes (shallowest to deepest):

• ES - Extra shallow bowl
• SV - Shallow "V" 
• S - Shallow bowl
• M - Medium bowl
• D - Medium-deep "V"
• C - Medium-deep bowl
• B - Deep bowl

Backbore Shapes (smallest to largest):

• 692sL - Extreme upper register use, very efficient
• 692s - Great lead backbore and for use on open horns
• 2 (standard) - Versatile with excellent tone color and intonation
• 69 - Commercial backbore. Great for recording with bright, focused sound
• 692 - Darker, broader sound than 69
• s - Symphonic backbore with opulent, teutonic sound
• X - Large broad sound that works great in rotary trumpets