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.

• 20W Hybrid ATR amplifier (ATR = Authentic Tube Response)
• 1x 12AX7 tube in the pre-amp
• 1x 12AX7 tube in the power amp
• Three foot-switchable channels: Cool (clean), Hot (overdrive) and Hot Gain Boost
• Volume control for the Cool channel and separate Gain and Volume controls for the Hot channel
• Passive Bass-Mid-Treble tone controls for both channels
• Spring emulated reverb with Volume control
• Dimmer for continuous control of the output power between 0W and 20W
• Buffered serial effects loop
• Recording output with passive speaker emulation filter
• Speaker on/off switch for silent recording
• Extension speaker jack
• 1x 10” Jensen Falcon C10-40 speaker
• 2-way footswitch included
• Dimensions 45(w) x 42 (h) x 23.5 (d) cm
• Weight ca. 12 kg