Which has a bigger cup — Bach 18 or Schilke 30C2?

The Schilke 30C2 has a cup diameter of 17.03 mm / 0.6705 in compared to 16.15 mm / 0.6358 in on the Bach 18 — a difference of 0.88 mm / 0.0346 in. A wider cup generally produces a fuller, darker tone but requires more air support.

How does cup depth compare between Bach 18 and Schilke 30C2?

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

Bach 18 vs Schilke 30C2

Name: Schilke 30C2
Brand: Schilke

The Schilke 30C2 has a wider cup diameter, the Bach 18 has a larger throat opening.

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

The taper behind the throat leading to the shank. Affects projection and tone character.

Mouthpiece A

Bach 18

• French Horn

Backbore—

Best suited for

🎵All-round versatile — balanced cup for general playing

📣High-volume projection — open throat for power

Mouthpiece B

Schilke 30C2

• French Horn

Backbore13

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.