Greg Black 290 Series 6G

EuphoniumIn Production
Precision Specifications
RIM DIAMETER25.4 mm
CUP DEPTHDeep
THROAT ∅7.37 mm
BACKBOREeuphonium
SHANKeuphonium
CUP SHAPEbowl
Rim Widthmedium-wide
Rim Contourmedium
Throat Drill #
Materialbrass
Finishsilver-plate
Weightmedium
Concert-BandBrass-BandStudent

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Resistance5/10
Rim Comfort5/10
Brightness5/10

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  • 290 Throat

The Greg Black 290 Series 6G is a deep-cup euphonium mouthpiece featuring a 25.4mm rim diameter and 7.37mm throat. It has a euphonium backbore, euphonium shank. Well-suited for student/developing playing. Notable features include 290 throat. 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.

Greg Black · BrassFit Science
Greg Black Guide
Trumpet cup and backbore logic, Symphony vs New York trombone lines, and low-brass system overview.

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