Which has a bigger cup — Bach 12E or Yamaha BL-59L?

The Yamaha BL-59L has a cup diameter of 27.22 mm / 1.0717 in compared to 24.50 mm / 0.9646 in on the Bach 12E — a difference of 2.72 mm / 0.1071 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 BL-59L?

The Yamaha BL-59L 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 BL-59L

Name: Yamaha BL-59L
Brand: Yamaha

The Yamaha BL-59L has a wider cup diameter, the Yamaha BL-59L features a deeper cup, the Yamaha BL-59L 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 BL-59L

• 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 BL-59L details Bach 12E equivalents Yamaha BL-59L equivalents

Bach 12E vs Yamaha BL-59L

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