SO HIGH SO LOW DUAL RESONANT FILTER & PREAMP

So High So Low is a classic dual resonant filter design, featuring two fully controllable High Pass and Low Pass filters arranged in series, each with independent cutoff and resonance controls. When combined, these filters create a bandpass mode - a hallmark of classic synth family that surpasses the limitations of switchable filter designs.

Separate CV and expression inputs for each filter provide complete dynamic control for live performances and effortless integration with modular systems. A dedicated preamp further enriches the tonal palette, offering everything from gentle saturation to intense overdrive and distortion.

FEATURES:

  • High Pass & Low Pass Filters
    High Pass and Low Pass resonant filters inspired by MS-20 with separate cutoff and resonance controls. Filters are arranged in series and have controllable resonance. Past the oscillation point each filter begins to self oscillate and can be used as a CV controlled oscillator.
  • Preamp
    SHSL has a dedicated preamp section which is inspired by Moogerfooger pedals providing the beautiful colouring to the sound. The pre section can operate in array of modes from light saturation to pushing the amp into overdrive/distortion territory.
  • CV & EXP controls
    Separate CV inputs for each filter allow to control the the pedal with the external controllers like Korg SQ-1 or Arturia devices. You can also sync it with your modular or semi modular system. Separate expression inputs for each filter allow controlling the SHSL with the expression pedal.

CONTROLS:

  • Master: Sets the overall output volume.
  • Preamp/Saturation: Rotate clockwise to add gain from the preamp section, which produces a darker, full-bodied, and saturated sound.
  • High Pass:  Rotate clockwise to strengthen the high pass. As you turn the knob to the right, fewer low frequencies will remain, allowing only the high frequencies to pass through the filter.
  • Low PassRotate counterclockwise to enhance the low pass. As you turn the knob to the left, fewer high frequencies will remain, allowing only the low frequencies to pass through the filter.
  • Resonance High: Sets the amount of amplification for the high frequencies around the cutoff point of the high pass filter. Increase the amplification by rotating the knob clockwise. The filter will begin to oscillate beyond the OSC Point.
  • Resonance Low: Sets the amount of amplification for the low frequencies around the cutoff point of the low pass filter. Increase the amplification by rotating the knob clockwise. The filter will start to oscillate beyond the OSC Point.
So High So Low high pass/low pass filter and preamp based on Korg MS-20 filter and Moogerfooger preamp.
There are demos on YouTube, on our web site and Instagram.
The filters are arranged in series.
Yes, the high pass and low pass filters are arranged in series, so you can use them as a bandpass.
Yes, you can connect CV to both: high pass and low pass filters.
You can connect your expression pedal to either high pass or low pass input and control the cutoff with it (similar to a wah pedal for example).
Absolutely! SHSL loves bass an it is a terrific combo.
Not to run the So High So Low pedal on anything higher than 9V. Otherwise you'll fry the pedal.
Only 9V center negative (Boss type) power supply is supported. There is a voltage conversion inside the pedal and it will fry if you connect a higher voltage. The minimum current must be 200mA (though 300mA is recommended for proper operation)
SHSL needs current of minimum of 200mA, though we recommend 300mA minimum for stable operation.
Yes, both filters can oscillate when the resonance is past the oscillation (OSC) point.
Yes, So High So Low is a true bypass.
No, we have taken care that SHSL runs on a standard 9V Boss type power supply. We are boosting the voltage internally for the proper operation of the filters and preamp.
SHSL Mk.II is a mono pedal.
The preamp is located before the filters. 
SHSL has expression controls for each filter cutoff and two CV inputs: one for high pass, one for low pass.
Yes, we are shipping worldwide.
Moreover, SHSL will be available with the UK and USA dealers.

The SHSL is available for purchase directly from the AMC store with worldwide shipping, or through one of the following venues

SO HIGH SO LOW MANUAL