Which has a bigger cup — Bach 8 or Schilke 38D?

The Bach 8 has a cup diameter of 24.75 mm / 0.9744 in compared to 19.73 mm / 0.7768 in on the Schilke 38D — a difference of 5.02 mm / 0.1976 in. A wider cup generally produces a fuller, darker tone but requires more air support.

How does cup depth compare between Bach 8 and Schilke 38D?

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

Bach 8 vs Schilke 38D

Name: Schilke 38D
Brand: Schilke

The Bach 8 has a wider cup diameter.

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

The narrowest point at the bottom of the cup. Affects resistance, volume, and tone color.

Mouthpiece A

Bach 8

• Baritone / Euphonium

Throat diameter5.85 mm / 0.2303 in

Best suited for

📣High-volume projection — open throat for power

Mouthpiece B

Schilke 38D

• Baritone / Euphonium

Throat diameter—

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.