Yamaha HR-33B

French HornIn Production
Precision Specifications
RIM DIAMETER17.87 mm
CUP DEPTHDeep
THROAT ∅3.9 mm
BACKBOREStandard
SHANKHorn
CUP SHAPEv-shaped
Rim Widthstandard
Rim Contourstandard
Throat Drill #
Materialbrass
FinishSilver plated
Weight
OrchestralClassicalAll Around

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Rim Comfort5/10
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Yamaha HR-33B appears in the French Horn catalog section with 17.87 mm rim, Deep cup, 3.9 mm throat, Standard backbore, and Horn shank. Database tags list it for Orchestral, Classical, and All Around use. Use these measurements as a comparison starting point: fit and response still depend on the player, dental structure, instrument receiver, and each manufacturer's measuring method.

Yamaha · BrassFit Science
Yamaha Mouthpiece Guide
Yamaha mouthpiece numbering, cup families, and instrument-specific selection guide.

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