Which has a bigger cup — Bach 8½A or Conn Connstellation 9BN?

The Bach 8½A has a cup diameter of 16.10 mm / 0.6339 in compared to 15.88 mm / 0.6252 in on the Conn Connstellation 9BN — a difference of 0.22 mm / 0.0087 in. A wider cup generally produces a fuller, darker tone but requires more air support.

How does cup depth compare between Bach 8½A and Conn Connstellation 9BN?

Both mouthpieces share a very deep cup depth, so the sound character from depth alone will be very similar.

Bach 8½A vs Conn Connstellation 9BN

Name: Conn Connstellation 9BN
Brand: Conn

The Bach 8½A has a wider cup diameter.

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 8½A

• Cornet

Backbore—

Mouthpiece B

Conn Connstellation 9BN

• Cornet

Lead

Backbore—

Best suited for

📋Trumpet players seeking precise matched dimensions

🎶Size 9 (15.88mm); smaller cup; more compact tone; Narrow rim; smaller inner radius; sharper bite. Fa

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.

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Bach 8½A vs Conn Connstellation 9BN

Playing Characteristics

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