The Yamaha B89-TR-7B4 is a trumpet mouthpiece with a medium-shallow B-cup and a medium rim diameter. It is designed to deliver a clear, bright tone with slightly more depth and warmth than the A-cup models, while still offering good high-register playability. This makes it a versatile choice for players who need a balance between upper-register ease and tonal richness.
Specifications
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Model Code: B89-TR-7B4
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Instrument: Trumpet
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Series: Standard / B-cup design
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Rim Shape: Comfortable, slightly flat
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Cup Depth: Medium-shallow (B cup)
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Inner Rim Diameter: Approx. 16.20 mm
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Throat Size: 3.65 mm (#27)
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Backbore: Medium
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Tone: Bright but with more body than A-cup models; good mix of projection and warmth
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Recommended For: Advancing players, lead/commercial work, versatile across ensemble settings
