Willson K56S Bb Euphonium

The flagship of the K Series, the WEUK56 is a fully compensating 3+1 euphonium designed for advanced players ready to take the next step in their musical journey. With a .590” bore and 11.5” bell, it delivers a bold, resonant tone and exceptional intonation across all registers. Whether you’re performing in brass bands, preparing for university auditions, or stepping onto the solo stage, the WEUK56 offers a mature, commanding voice with professional-grade features and accessible playability—empowering musicians to perform with confidence, precision, and expressive depth. 0.590" bore with 11.5" bell. Includes case and mouthpiece.