The Koch J20 C110, the little brother of the Jupiter 45. Two independent volume controls for the "Cool" and "Hot" channels share a tone control.
The "Hot" channel also has a "Boost" function, which supplies this channel with more gain. The integrated reverb is based on a spring reverb. A buffered loop-in path offers the option of introducing further effects without loss of sound. With a throttle for performance, speaker off function and recording output, the Junior 20 is ideal for silent recording.