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 width of the rim surface that contacts the lips. Wider rims improve endurance; narrower rims improve flexibility.

Mouthpiece A

Bach 8

• Baritone / Euphonium

Rim width—

Best suited for

📣High-volume projection — open throat for power

Mouthpiece B

Schilke 38D

• Baritone / Euphonium

Rim width—

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.