KMA Audio Machines HorizonT Phaser – Stereo Multispatial JFET Pedal


By combining lush analog JFET phasing with digitally controlled dynamics, the HorizonT creates a vivid and expressive modulation experience, all while providing experimental and creative features

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KMA Audio Machines HorizonT Phaser

The KMA Audio Machines HorizonT’s mission is to push way beyond the classic phasing sounds. It will take you to uncharted phaser worlds the second you plug in.

HorizonT creates a vivid and expressive modulation experience, all while providing experimental and creative features. Combining lush analog JFET phasing with digitally controlled dynamics, will kick phasing well into the 21st century.

Besides the more common phaser controls, the Horizont offers a range of new and exciting options.

It greatly broadens the range of phasing tones available. Also, we implemented a digital LFO with no less than eight different waveforms:

  • Ramp Up/Down,
  • Sine/Triangle/Square wave,
  • A sweeping waveform,
  • Sample & Hold
  • Random slope waveform going from 20s down to 40ms.

The implemented envelope generator is one of Horizont’s absolute key features.

It transforms your input signal into a control source to modulate the speed of the digitally controlled LFO.

Or it lets you manually phase for a resonant touch wah-like sound. This will depend on the state of the SWP- and SPURTCONTROL switch.



Set the SPURTCONTROL switch to LFO to let the SPURT knob adjust the internal phasing speed.

However, the switch to ENV mode, it allows you to dynamically modulate the speed.

You can do this along with the full LFO speed range, based on how hard you attack the strings.

You can also combine the SPURT knob and the envelope by clicking the toggle to LFO + ENV . SPURT then sets the minimum speed.

For even more control, you can even plug in an external expression pedal/CV-source (0-5V).

This alters the minimum speed on-the-fly. Or you can use the Tap temp switch to set the speed to fit in with the tempo of your music.

Exp Mode

The EXP-Mode switch also lets you choose between a manual phasing mode or an external CV source. This is controlled by an external expression pedal.

Setting the EXP-Mode switch to the middle position will disable any external expression control.


The SWP switch lets you decide to use either the LFO or the envelope of your instrument signal to control the phasing.

The envelope can be set to upwards or downwards operation via the ENV switch.

In conjunction with the FUEL (Sensitivity) and the DECAY controls, the envelope can be tailored perfectly to your needs.

Emphasis Mode

We kept the EMPH (Emphasis) mode from our original Astrospurt Phaser, but have reworked and refined it extensively for the Horizont.

The four toggle-switches determine the stage in which the phase-shifted signal is fed back into itself, while the REG (Regeneration) control sets the feedback amount.

We also smoothed out the overall sound of the EMPH mode for a more pronounced, and crisp vocal-like tone.

Each of the different switch variations and turn of the REG control will yield different results.

Discover new wild, fuzzy and noisy galaxies as you travel deeper down this sonic wormhole.

In order for you to levitate through spacetime, we’ve also added a stereo output to the Horizont.

You can switch between a standard stereo output or a panning output, via the STEREOPAN switch.

Synchronized with the LFO speed, the upper cycle of the LFO sends the signal to the OUT1 and the bottom cycle to the OUT2.

FX Loop

Last but by no means least, we equipped the Horizont with an FX-Loop right in front of the phase-shifting line.

This enables you to add your own secret sonic weapons to this spaceship, seeing you create your very own unique phasing sounds.

We’ve also increased the pedal’s headroom drastically by boosting the internal circuit voltage to 18V, from the regular 9V input, to give the cleanest phasing possible no matter what instrument or line source you use.

The HorizonT in Use

This is without a shadow of a doubt the most liquid and astonishing phasing experience you’ll ever embark upon.

But wait, there’s more! Stop and take a deep breath, set the MIX control to fully clean and the Horizont is transformed into a Tremolo on-the-spot, with all the other aforementioned features.

But don’t be fooled by all of these seemingly complex features, the Horizont is a super intuitive next generation phaser that’ll see your tone take flight in seconds flat.

Whether you are looking for traditional phasing sounds, experimental synthetic soundscapes or super dynamical sonic endeavors, the Horizont will have you covered to infinity and beyond.

You can see videos and an interactive setting tool for specific sound examples here


Requires standard 9V DC (max.) PSU (negative center, 2.1mm, approx. 75 mA current draw)

Additional information

Weight 0.55 kg
Dimensions 15.5 × 12.5 × 6 cm
Analogue or Digital



Purple, Pink


75 mA



Pedal Type


Power Connection Type

Centre Negative

Silicon or Germanium




EAN 13







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