Which has a bigger cup — Bach 8½A or Conn Precision 3?

The Conn Precision 3 has a cup diameter of 16.41 mm / 0.6461 in compared to 16.10 mm / 0.6339 in on the Bach 8½A — a difference of 0.31 mm / 0.0122 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 Precision 3?

The Bach 8½A has a very deep cup while the Conn Precision 3 has a medium cup. Deeper cups favor a darker, richer sound; shallower cups provide more brightness and easier upper register.

Bach 8½A vs Conn Precision 3

Name: Conn Precision 3
Brand: Conn

The Conn Precision 3 has a wider cup diameter, the Bach 8½A features a deeper cup.

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

Surface plating or treatment (e.g. silver plate, gold trim). Affects feel, durability, and appearance.

Mouthpiece A

Bach 8½A

• Cornet

Finish—

Mouthpiece B

Conn Precision 3

• Cornet

General

Finish—

Best suited for

🎵All-round versatile — balanced cup for general playing

📋All-around use; most popular model

🎶Bright quality of tone in all registers; good all-around

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 8½A details Conn Precision 3 details Bach 8½A equivalents Conn Precision 3 equivalents

Bach 8½A vs Conn Precision 3

Playing Characteristics

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What Changes If You Switch?

Which is better?

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