Which has a bigger cup — Conn Precision 3 or Conn Precision 4?

Both mouthpieces have virtually identical cup diameters at 16.41 mm / 0.6461 in.

How does cup depth compare between Conn Precision 3 and Conn Precision 4?

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

Name: Conn Precision 4
Brand: Conn

Both mouthpieces share similar core dimensions — the differences are in the details.

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

Mouthpiece A

Conn Precision 3

• Cornet

General

MaterialSilver-plated brass

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

Mouthpiece B

Conn Precision 4

• Cornet

General

MaterialSilver-plated brass

Best suited for

🎵All-round versatile — balanced cup for general playing

📋Players with large lips; close to Bach 2C/Schilke 16C4

🎶Bright tone; same as Model 3 with wide rim

Both mouthpieces share the same listed material (Silver-plated brass).

Both mouthpieces are categorized as "General" — the physical dimensions above will determine which suits your embouchure and playing style better.