From Clark Fobes: "My extensions do not extend the range of the Eb. The extension fits between the bell and the end of the clarinet adding a properly sized and positioned tone hole to produce the E/B twelfth. Due to the much larger impedance of sound at the end of the clarinet the long B natural is often resistant and of a much different timbre than the throat tones. My extension greatly alleviates this problem - it also reduces the oversized twelfth interval. As a very happy coincidence the extension of the air column tends to even the timbre of both clarinets and produces a much more supple tone through all registers."
Please Note: There are have two styles of extensions. The Buffet style will also fit Yamaha. The Selmer style fits Selmer only. Neither extension fit Leblanc.
INSTRUMENT: E-flat Clarinet
STYLE: Buffet/Yamaha or Selmer
MANUFACTURER: Clark W Fobes
CODE:
FOBEX: Fobes Extensions for Eb Clarinet (Buffet/Yamaha)
FOBEX: Fobes Extensions for Eb Clarinet (Selmer)