Bastl Instruments Hendrikson


External amplifier and external effects processor

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Hendrikson is a guitar/ instrument amplifier and an interface for external effects processors like stomp boxes. The most unique feature is the mix output which is CV controllable crossfader between the signal that goes to the Output and signal that comes to the Input. This means that when used with external effects processor this gives CV control of one of the most important parameters – the Dry / Wet Mix. This is especially interesting when using with fuzz or distortion effects for waveshaping basic waveforms.

When Hendrikson is used just as guitar / instrument amplifier the mix out is in fact a VCA after the gain stage, so you can instantly create tremolo effects by plugging the CV to the MIX CV input.

Another great application of Hendrikson is CV controllable feedback loop of external effects chain. Simply route the signal from Mix Output back to the Output and listen what happens when the signal comes back thru the Input.


  • Output Level knob sets the buffered attenuation of the output
  • Adjust the output signal to guitar or line level with help of Clipping Leds
  • Input Gain knob on the input with modular level indication (5V peak to peak)
  • Voltage controlled crossfader between the output and input signal
  • Mix KNOB sets the offset and MIX CV adds to set the crossfade at the MIX OUT
  • 6.3 mm (¼ inch) Neutrik connectors for Output and Input

40 mA +12V
35 mA -12V
0 mA 5V
45 mm deep

Additional information

Weight 0.15 kg
Dimensions 16 × 11 × 5 cm