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

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

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

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

Name: Conn Imp. 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 Imp. Precision 3

• Cornet

General

MaterialSilver-plated brass

Best suited for

🎵All-round versatile — balanced cup for general playing

📋Most popular model; all-around

🎶Bright quality of tone in all registers

Mouthpiece B

Conn Imp. Precision 4

• Cornet

General

MaterialSilver-plated brass

Best suited for

🎵All-round versatile — balanced cup for general playing

📋Players with large full lips; most common surviving example

🎶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.