Which has a bigger cup — Bach 17D or Schilke 38D?

The Bach 17D has a cup diameter of 24.20 mm / 0.9528 in compared to 19.73 mm / 0.7768 in on the Schilke 38D — a difference of 4.47 mm / 0.1760 in. A wider cup generally produces a fuller, darker tone but requires more air support.

How does cup depth compare between Bach 17D and Schilke 38D?

The Schilke 38D has a medium cup while the Bach 17D has a shallow cup. Deeper cups favor a darker, richer sound; shallower cups provide more brightness and easier upper register.

Bach 17D vs Schilke 38D

Name: Schilke 38D
Brand: Schilke

The Bach 17D has a wider cup diameter, the Schilke 38D features a deeper cup.

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

Surface plating or treatment (e.g. silver plate, gold trim). Affects feel, durability, and appearance.

Mouthpiece A

Bach 17D

• Baritone / Euphonium

Finish—

Best suited for

📣High-volume projection — open throat for power

Mouthpiece B

Schilke 38D

• Baritone / Euphonium

Finish—

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.