The Hans Hoyer K10 F/Bb Double Horn is the newest innovation for the orchestra. The design was developed in close cooperation with Markus Wittgens, Principal horn in the Gurzenich Orchestra in Cologne and is a member of the Bayreuth Festival Orchestra.

The K10 has a well-orchestrated middle range and a greatly responsive low register. An unknown ease in the higher area is obtained with a light rotary valve set, a full-flow switch valve, and an individually adjustable mouthpiece receiver – a pleasant, well-balanced set up for any professional.

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Hans Hoyer K10 Double Horn detailed specifications

Mouthpiece position in the Horn’s lead pipe is critical. For best response and articulation, each K10 is supplied with a selection of 6 different mouthpiece receivers to achieve a perfect fit with the most common mouthpiece shanks. (More information on mouthpiece receivers.)

Each K10 undergoes a series of tests by Markus Wittgens personally before being packaged and sent to our customers. (Video about Markus’ testing.)


  • Key: F/Bb
  • Bore: .468″ / 11,90 mm
  • Bell: 12.204″ / 310 mm
  • Valves: 4 lightweight conical rotary valves, 3B linkage system, full flow switch valve
  • Features: Interchangeable mouthpiece receiver system (includes 6 tapers), hand-hammered medium-large (ML) throat bell (detachable), full-flow switch valve, detachable gold brass lead pipe, 3D adjustable finger hook, adjustable thumb lever and hand rest (flipper)
  • Options: Additional lead pipes in brass, gold brass or nickel silver, regular or smaller taper
  • Finish: Unlacquered or clear lacquer
  • Outfit: Mouthpiece, rotor oil, slide grease, torx/Alan wrenches, cleaning cloth, Bonna case


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Shipping charge includes insurance. If you prefer shipping without insurance, you may call to place your order.

Please contact us about a test playing appointment, more information, or to place a special order.