Which has a bigger cup — Bach 1½C or Schilke 13D4?

The Bach 1½C has a cup diameter of 17.00 mm / 0.6693 in compared to 16.89 mm / 0.6650 in on the Schilke 13D4 — a difference of 0.11 mm / 0.0043 in. A wider cup generally produces a fuller, darker tone but requires more air support.

How does cup depth compare between Bach 1½C and Schilke 13D4?

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

Bach 1½C vs Schilke 13D4

Name: Schilke 13D4
Brand: Schilke

The Bach 1½C 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 1½C

• Trumpet

Throat diameter3.66 mm / 0.1441 in

Mouthpiece B

Schilke 13D4

• Trumpet

Throat diameter3.66 mm / 0.1441 in

Throat Diameter

Throat diameters are essentially identical at 3.66 mm / 0.1441 in, so resistance feel will be comparable.

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.