Which has a bigger cup — Bach 18D or Schilke 45B?

The Schilke 45B has a cup diameter of 24.30 mm / 0.9567 in compared to 24.20 mm / 0.9528 in on the Bach 18D — a difference of 0.10 mm / 0.0039 in. A wider cup generally produces a fuller, darker tone but requires more air support.

How does cup depth compare between Bach 18D and Schilke 45B?

The Schilke 45B has a medium cup while the Bach 18D has a shallow cup. Deeper cups favor a darker, richer sound; shallower cups provide more brightness and easier upper register.

Bach 18D vs Schilke 45B

Name: Schilke 45B
Brand: Schilke

The Schilke 45B has a wider cup diameter, the Schilke 45B features a deeper cup, the Schilke 45B has a larger throat opening.

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

Base metal or construction (e.g. brass, stainless steel, plastic). Influences weight, response, and tone color.

Mouthpiece A

Bach 18D

• Trombone

Material—

Best suited for

📣High-volume projection — open throat for power

Mouthpiece B

Schilke 45B

• Trombone

Material—

Best suited for

📣High-volume projection — open throat for power

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.

Open in interactive tool + Add third mouthpiece Bach 18D details Schilke 45B details Bach 18D equivalents Schilke 45B equivalents

Bach 18D vs Schilke 45B

Playing Characteristics

What Do These Model Names Mean?

What Changes If You Switch?

Which is better?

Compare Bach 18D with others

Compare Schilke 45B with others

Popular Trombone comparisons

Bach vs Schilke

Browse by specification