Bach 18 vs Monette Tuba 97 (Lightweight)
Both mouthpieces share similar core dimensions — the differences are in the details.
Mouthpiece A
Bach 18
• Tuba
Cup diameter32.10 mm / 1.2638 in
Cup depthMedium
Rim width—
Throat diameter9.00 mm / 0.3543 in
Backbore—
Finish—
Material—
Best suited for
High-volume projection — open throat for power
vs
Mouthpiece B
Monette Tuba 97 (Lightweight)
• Tuba
Cup diameter—
Cup depthMedium
Rim width—
Throat diameter—
Backbore—
Finish—
Material—
Cup Depth
Both mouthpieces share a medium cup depth, so the sound character from depth alone will be very similar.
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.