AJH Synth - Mega-Phase 12 - BLACK


Mega-Phase 12 is a stereo phaser with beefy, clearly analog sound. The module is based on the Small Stone developed by Electro Harmonix. In contrast to the classic effects pedal, however, here you don’t have four, but up to twelve filter stages at hand. The resonance can be varied in strength plus it is possible to choose the pick-up point in the signal path. Results range from transparent and softly wafting to strongly colored and wildly swirling. If all this is still not crazy enough for you, add a second, external feedback loop and tie in some other modules.



Mega-Phase 12 comes equipped with two audio inputs. One of them features a level potentiometer. The phaser effect can not only be edited via frequency and resonance potentiometers, but also offers switches for determining the number of filter stages used and for selecting the pick-up point of the resonance. Details:

  • You can use two, four, six, seven, eight, ten, eleven or twelve filter stages.
  • The resonance signal can be picked-up at the fourth, sixth, seventh, eighth, ninth, tenth, eleventh or twelfth filter pole.

By altering the parameters described above, the sound character of the Mega-Phase 12 can be varied extensively. From transparent to heavily colored, everything is possible. You can even produce effects with a vocal-like flavor. A Depth potentiometer alters the effect intensity.

Typical phaser effects are impossible without modulating the filter’s frequency, of course. Mega-Phase offers two CV inputs, one with a unipolar and one with a bipolar attenuator. The control voltage channel with unipolar level control is normalized to the module’s LFO. Its frequency can be altered via the Rate knob. A CV output allows you to use the LFO to influence other modules. Resonance and Depth parameters are voltage controllable as well.

The mix signal is emitted via left and right output. In addition, there is a wet output. This socket can be used to patch a second, external feedback loop. Connect the wet output to the audio input with level control, so you can alter the feedback intensity. If you’d like to go even further, why don’t you add some additional modules? A filter like the AJH Minimod VCF with fast S&H cutoff modulation gives you some great results, for instance.


Two audio inputs (L / R)
two mix audio outputs (L / R)
Wet audio output
LFO output
Two frequency CV inputs
Resonance and Depth CV inputs


3U Eurorack module, 18 HP wide, compatible with Skiff cases
Power consumption: 70 mA at +12 V and 65 mA at -12 V

0.25 kg
Article Number

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