Bach 5C vs Schilke 7B4
The Bach 5C has a wider cup diameter, the Bach 5C has a larger throat opening.
Mouthpiece A
Bach 5C
• Trumpet
Cup diameter16.25 mm
Cup depthMedium
Rim width—
Throat diameter3.66 mm
Backbore—
Finish—
Material—
Best suited for
All-round versatile — balanced cup for general playing
vs
Mouthpiece B
Schilke 7B4
• Trumpet
Cup diameter16.08 mm
Cup depthMedium
Rim width—
Throat diameter3.65 mm
Backbore26
Finish—
Material—
Best suited for
All-round versatile — balanced cup for general playing
Cup Diameter
The Bach 5C has a cup diameter of 16.25 mm compared to 16.08 mm on the Schilke 7B4 — a difference of +0.17 mm. A wider cup generally produces a fuller, darker tone but requires more air support.
Cup Depth
Both mouthpieces share a medium cup depth, so the sound character from depth alone will be very similar.
Throat Diameter
The Bach 5C has a wider throat (3.66 mm vs 3.65 mm). 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.