Yamaha AH-38D4 vs Yamaha AH-38D4
Both mouthpieces share similar core dimensions — the differences are in the details.
Mouthpiece A
Yamaha AH-38D4
• Baritone / Euphonium
Cup diameter18.90 mm / 0.7441 in
Cup depthDeep
Rim width—
Throat diameter5.25 mm / 0.2067 in
BackboreStandard
Finish—
Material—
Best suited for
Orchestral playing — large cup for full, dark tone
High-volume projection — open throat for power
vs
Mouthpiece B
Yamaha AH-38D4
• Baritone / Euphonium
Cup diameter18.90 mm / 0.7441 in
Cup depthDeep
Rim width—
Throat diameter5.25 mm / 0.2067 in
BackboreStandard
Finish—
Material—
Best suited for
Orchestral playing — large cup for full, dark tone
High-volume projection — open throat for power
Cup Diameter
Both mouthpieces have virtually identical cup diameters at 18.90 mm / 0.7441 in.
Cup Depth
Both mouthpieces share a deep cup depth, so the sound character from depth alone will be very similar.
Throat Diameter
Throat diameters are essentially identical at 5.25 mm / 0.2067 in, so resistance feel will be comparable.
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.