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Kuhnl & Hoyer Orchestra Signature Bass Trombone with Open-Flow Rotors and Screw Bell Flare


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Item Details

The K&H Orchestra Signature bass trombone is a premier instrument custom made in Markt Erlbach, Bavaria, Germany.  The modular system allows customization to your preferences.  This is one of very few bass trombones featuring the new Meinlschmidt Open-Flow rotary valves.  These rotors are remarkable, and when mated to a fine German instrument like the Kuhnl & Hoyer, it's captivating.

I usually order these with screw bell flare.  The new bell screw ring is half the weight of any other, and the case looks like a viola case.

This model with inline rotors in F/Gb/D is the modern setup for the most agility in the low range by permitting independent use of either rotor.  A slightly more resistant response enhances the highs in the tone, giving more center.  The pedal tones may feel more resistant compared to the stacked rotor setup, but not much.  But hardly anyone orders stacked valves anymore, so inline it is.

Extra attention is paid to ergonomics on these trombones.  The hand slide features a curved brace and the bell section has an additional curved brace behind the first trigger paddle.  The second trigger paddle is curved to fit more comfortably and an optional  hand rest is available to support the back of the player's left hand.  The curved bracing isn't for everyone, but these can also be built to order with the bell brace above your thumb, and an additional thumb rest, called the Sonor model from K&H


  • Modular components for your preferred setup
  • Ergonomic grip and curved hand braces
  • Screw bell flare for compact travel with new lightweight ring
  • Meinlschmidt Open-Flow rotors, inline in F/Gb/D
  • Removable mouthpipe
  • Unsoldered bell rim bead
  • Lightweight acoustic bracing
  • Flawless construction and component action
  • Includes mouthpiece and Marcus Bonna fiberglass case


  • Nickel hand slide
  • 240mm or 260mm bell with fixed flare, yellow or gold brass
  • Hand rest

Bell Weights

  • Yellow Brass 240mm 19.1 oz.
  • Gold Brass 260mm  20.2 oz.
  • Yellow Brass 240mm with Screw Flare 21.0 oz.
  • Gold Brass 240mm with Screw Flare 20.5 oz.


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