Which has a bigger cup — Bach 12E or Yamaha SL-47L?

The Yamaha SL-47L has a cup diameter of 24.98 mm / 0.9835 in compared to 24.50 mm / 0.9646 in on the Bach 12E — a difference of 0.48 mm / 0.0189 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-47L?

The Yamaha SL-47L 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-47L

Name: Yamaha SL-47L
Brand: Yamaha

The Yamaha SL-47L has a wider cup diameter, the Yamaha SL-47L 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 12E

• Trombone

Material—

Best suited for

📣High-volume projection — open throat for power

Mouthpiece B

Yamaha SL-47L

• 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 12E details Yamaha SL-47L details Bach 12E equivalents Yamaha SL-47L equivalents

Bach 12E vs Yamaha SL-47L

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