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

Base metal or construction (e.g. brass, stainless steel, plastic). Influences weight, response, and tone color.

Mouthpiece A

Bach 8½A

• Cornet

Material—

Mouthpiece B

Conn Connstellation 9BN

• Cornet

Lead

MaterialSilver-plated brass

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

Material

The Bach 8½A is described as unspecified, and the Conn Connstellation 9BN as Silver-plated brass. Material affects mass, warmth, and how quickly the piece responds.

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

Material

Playing Characteristics

What Do These Model Names Mean?

What Changes If You Switch?

Which is better?

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