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A pre-amplifier is an indispensable device for controlling a power amplifier e.g. our K4040 valve amplifier or K8040amplifiers. When developing this pre-amplifier we opted for DIGITAL control of all functions so that the end product contains no potentiometers at all ! All functions, such as volume, tone control, balance and input selection can be operated using push buttons. A LED display gives a clear indication of all settings. Most functions can be operated with a remote control unit (K8049) available as an option).