Which has a bigger cup — Bach 8½BW or Yamaha AH-38D4?

The Bach 8½BW has a cup diameter of 24.75 mm / 0.9744 in compared to 18.90 mm / 0.7441 in on the Yamaha AH-38D4 — a difference of 5.85 mm / 0.2303 in. A wider cup generally produces a fuller, darker tone but requires more air support.

How does cup depth compare between Bach 8½BW and Yamaha AH-38D4?

The Yamaha AH-38D4 has a deep cup while the Bach 8½BW has a shallow cup. Deeper cups favor a darker, richer sound; shallower cups provide more brightness and easier upper register.

Bach 8½BW vs Yamaha AH-38D4

Name: Yamaha AH-38D4
Brand: Yamaha

The Bach 8½BW has a wider cup diameter, the Yamaha AH-38D4 features a deeper cup, the Bach 8½BW 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 8½BW

• Baritone / Euphonium

Material—

Best suited for

📣High-volume projection — open throat for power

Mouthpiece B

Yamaha AH-38D4

• Baritone / Euphonium

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.

Open in interactive tool + Add third mouthpiece Bach 8½BW details Yamaha AH-38D4 details Bach 8½BW equivalents Yamaha AH-38D4 equivalents

Bach 8½BW vs Yamaha AH-38D4

Playing Characteristics

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