Which has a bigger cup — Bach 1B or Conn Connstellation 5BN?

The Bach 1B has a cup diameter of 17.00 mm / 0.6693 in compared to 16.76 mm / 0.6598 in on the Conn Connstellation 5BN — a difference of 0.24 mm / 0.0094 in. A wider cup generally produces a fuller, darker tone but requires more air support.

How does cup depth compare between Bach 1B and Conn Connstellation 5BN?

The Conn Connstellation 5BN has a very deep cup while the Bach 1B has a deep cup. Deeper cups favor a darker, richer sound; shallower cups provide more brightness and easier upper register.

Bach 1B vs Conn Connstellation 5BN

Name: Conn Connstellation 5BN
Brand: Conn

The Bach 1B has a wider cup diameter, the Conn Connstellation 5BN features a deeper cup.

Overall Comparison Cup Diameter Cup Depth Rim Width Throat Diameter Backbore Finish Material

The narrowest point at the bottom of the cup. Affects resistance, volume, and tone color.

Mouthpiece A

Bach 1B

• Cornet

Throat diameter3.66 mm / 0.1441 in

Best suited for

🎻Orchestral playing — large cup for full, dark tone

Mouthpiece B

Conn Connstellation 5BN

• Cornet

Orchestral

Throat diameter—

Best suited for

📋Trumpet players seeking precise matched dimensions

🎶Size 5 (16.76mm); 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.

Open in interactive tool + Add third mouthpiece Bach 1B details Conn Connstellation 5BN details Bach 1B equivalents Conn Connstellation 5BN equivalents

Bach 1B vs Conn Connstellation 5BN

Playing Characteristics

What Do These Model Names Mean?

What Changes If You Switch?

Which is better?

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