Which has a bigger cup — Bach 17 or Bach 19?

The Bach 17 has a cup diameter of 24.20 mm / 0.9528 in compared to 24.00 mm / 0.9449 in on the Bach 19 — a difference of 0.20 mm / 0.0079 in. A wider cup generally produces a fuller, darker tone but requires more air support.

How does cup depth compare between Bach 17 and Bach 19?

The Bach 19 has a deep cup while the Bach 17 has a medium cup. Deeper cups favor a darker, richer sound; shallower cups provide more brightness and easier upper register.

Bach 17 vs Bach 19

Name: Bach 19
Brand: Bach

The Bach 17 has a wider cup diameter, the Bach 19 features a deeper cup.

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 17

• Trombone

Material—

Best suited for

📣High-volume projection — open throat for power

Mouthpiece B

Bach 19

• Trombone

Material—

Best suited for

🎻Orchestral playing — large cup for full, dark tone

📣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.