Which has a bigger cup — Bob Reeves 41/M/s or Conn Precision 4?

The Conn Precision 4 has a cup diameter of 16.41 mm / 0.6461 in compared to 16.27 mm / 0.6406 in on the Bob Reeves 41/M/s — a difference of 0.14 mm / 0.0055 in. A wider cup generally produces a fuller, darker tone but requires more air support.

How does cup depth compare between Bob Reeves 41/M/s and Conn Precision 4?

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

Bob Reeves 41/M/s vs Conn Precision 4

Name: Conn Precision 4
Brand: Conn

The Conn Precision 4 has a wider cup diameter.

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

Bob Reeves 41/M/s

• Cornet

Throat diameter—

Best suited for

🎵All-round versatile — balanced cup for general playing

Mouthpiece B

Conn Precision 4

• Cornet

General

Throat diameter—

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

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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Bob Reeves 41/M/s vs Conn Precision 4

Playing Characteristics

What Do These Model Names Mean?

What Changes If You Switch?

Which is better?

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