How does cup depth compare between Bach 18 and Conn Precision 2?

The Conn Precision 2 has a — cup while the Bach 18 has a medium cup. Deeper cups favor a darker, richer sound; shallower cups provide more brightness and easier upper register.

Bach 18 vs Conn Precision 2

Name: Conn Precision 2
Brand: Conn

the Conn Precision 2 features a deeper cup.

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

The internal diameter of the cup, measured at the widest point inside the rim.

Mouthpiece A

Bach 18

• Tuba

Cup diameter32.10 mm / 1.2638 in

Best suited for

📣High-volume projection — open throat for power

Mouthpiece B

Conn Precision 2

• Tuba

General

Cup diameter—

Best suited for

📋BBb bass; general use

🎶Full rich tone in all registers

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.