Bach 2½C vs Bach 5SV
The Bach 2½C has a wider cup diameter, the Bach 2½C features a deeper cup, the Bach 5SV has a larger throat opening.
The narrowest point at the bottom of the cup. Affects resistance, volume, and tone color.
Mouthpiece A
Bach 2½C
• Cornet
Throat diameter3.66 mm / 0.1441 in
Best suited for
All-round versatile — balanced cup for general playing
vs
Mouthpiece B
Bach 5SV
• Cornet
Throat diameter3.81 mm / 0.1500 in
Best suited for
High-volume projection — open throat for power
Throat Diameter
The Bach 5SV has a wider throat (3.81 mm / 0.1500 in vs 3.66 mm / 0.1441 in). A wider throat allows more air through, increasing volume and projection but reducing resistance.
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.