Clark Fobes Eb Clarinet Extension

Clark Fobes' extensions do not extend the range of the Eb clarinet, but instead, 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. Fobes' 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.

Eb extensions are designed to fit Buffet clarinets. They will fit Yamaha, but not Selmer.