Conn Connstellation 3BW vs Marcinkiewicz CH EF 21J. Cox
Both mouthpieces share similar core dimensions — the differences are in the details.
How deep the cup is, from shallow (brighter, easier high register) to deep (darker, fuller sound).
Mouthpiece A
Conn Connstellation 3BW
• French Horn
OrchestralCup depthVery deep
Best suited for
French horn players
French horn size 3; smaller cup; more compact tone; Wide rim; larger rounded inner radius; less bite
vs
Mouthpiece B
Marcinkiewicz CH EF 21J. Cox
• French Horn
Cup depthVery deep
Best suited for
Orchestral playing — large cup for full, dark tone
High-volume projection — open throat for power
Cup Depth
Both mouthpieces share a very deep cup depth, so the sound character from depth alone will be very similar.
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.