Bach 1½C vs Conn Connstellation 7BW

The Bach 1½C has a wider cup diameter, the Conn Connstellation 7BW features a deeper cup.

Overall Comparison Cup Diameter Cup Depth Rim Width Throat Diameter Backbore Finish Material
The taper behind the throat leading to the shank. Affects projection and tone character.
Mouthpiece A
    Bach 1½C
    • Cornet
    Backbore
    vs
    Mouthpiece B
      Conn Connstellation 7BW
      • Cornet
      General
      Backbore
      Best suited for
      📋Trumpet players seeking precise matched dimensions
      🎶Size 7 (16.42mm); smaller cup; more compact tone; Wide rim; larger rounded inner radius; less bite.

      Which is better?

      Neither mouthpiece clearly dominates the other — the right choice depends on your embouchure, playing style, and the sound you're after. Try both if possible.

      Open in interactive tool + Add third mouthpiece Bach 1½C details Conn Connstellation 7BW details Bach 1½C equivalents Conn Connstellation 7BW equivalents