The EMFX Kelvedon is simply put a wonderful and unique 2-in-1 Drive pedal. On the right it has the “1834” circuit which can be used as a tone-shaping clean boost with Bass and Treble Cut/Boost Switches. Controls of Volume, Gain, Presence enable control for tone even further. On the Left side we have the “1892” circuit. Based on the “Dumble” circuit it’s a very raw organic overdrive with absolute transparency. It can give a truly unique and exceptional sound from this giving a good drive with a boost function for a real rock n’ roll sound.