Rotary valves and slides that have been hand-lapped are airtight and have smooth action.
Articulated key levers have responsive motion.
Hammering and annealing are processes so important to the instrument's acoustic characteristics that Yamaha employs computer-controlled equipment to ensure consistently superior sound. Hammering enables bells to have a rich, resonant tone that blends beautifully with other instruments. Annealing is a cooling and heating process that makes it easier to control the acoustics of the instrument.
A cyclical bore is a perfectly cylindrical tubing assembly in combination with a conical leadpipe and bell system. This allows for consistent air flow throughout the horn.
Tapered valves wear for a long time without air leakage.
The combination of the secure high register, strong projection, and quick attack of the Bb horn with the rich, warm timbre of the F horn make the double horn ideal for most playing situations.
Level -Professional Double
Key - F/ Bb
Bell Diameter - 12 1/8"
Bell throat - Large
Leadpipe Material - Gold Brass
Body/ Bell Material - Yellow Brass; Nickel (YHR-668NII)
Bell Type - Fixed; Detachable (YHR-668DII/NDII)
Finish - Clear Epoxy Lacquer; Nickel-plating (YHR-668NII)
Mouthpiece - 30D4
Rotors - (4) Solid
Rotor Casing - Nickel silver
Lever Action - String
Water Key - Yes
Features - Adjustable thumb lever; Longer leadpipe taper;Larger bell taper
|Bell Diameter||12 1/8"|
|Leadpipe Material||Gold Brass|
|Body/ Bell Material||Yellow Brass; Nickel (YHR-668NII)|
|Bell Type||Fixed; Detachable (YHR-668DII/NDII)|
|Finish||Clear Epoxy Lacquer; Nickel-plating (YHR-668NII)|
|Rotor Casing||Nickel silver|
|Features||Adjustable thumb lever; Longer leadpipe taper;Larger bell taper|