Which has a bigger cup — Bach 12E or Yamaha SL-48S?

The Yamaha SL-48S has a cup diameter of 25.25 mm / 0.9941 in compared to 24.50 mm / 0.9646 in on the Bach 12E — a difference of 0.75 mm / 0.0295 in. A wider cup generally produces a fuller, darker tone but requires more air support.

How does cup depth compare between Bach 12E and Yamaha SL-48S?

The Yamaha SL-48S has a medium cup while the Bach 12E has a shallow cup. Deeper cups favor a darker, richer sound; shallower cups provide more brightness and easier upper register.

Bach 12E vs Yamaha SL-48S

Name: Yamaha SL-48S
Brand: Yamaha

The Yamaha SL-48S has a wider cup diameter, the Yamaha SL-48S features a deeper cup, the Yamaha SL-48S has a larger throat opening.

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

The taper behind the throat leading to the shank. Affects projection and tone character.

Mouthpiece A

Bach 12E

• Trombone

Backbore—

Best suited for

📣High-volume projection — open throat for power

Mouthpiece B

Yamaha SL-48S

• Trombone

BackboreSemi-wide

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 12E details Yamaha SL-48S details Bach 12E equivalents Yamaha SL-48S equivalents

Bach 12E vs Yamaha SL-48S

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