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Moog Moogerfooger MF-102 Ring Modulator

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Moog MF-102

Moog’s MF-102 Ring Modulator descends from components in the original Moog synthesizers that sum the frequencies of the input signal and an onboard carrier oscillator, which is itself modulated by a dedicated LFO. The MF-102 affords a varied range of effects—everything from tremolo, harmonic distortion, metallic sounds, and much more… The unit can be surprisingly subtle, or decidedly ostentatious, depending on the user’s preferences. 

The MF-102 features an ergonomic front panel with easy manual access to all parameters, which can also be tweaked using expression pedals or control voltages. Like all of the pedals in the Moogerfooger series, the MF-102 features a bypass switch that makes it perfect for both desktops and stomp box use. 

MF-102 Features

  • Frequency rotary control, which varies the carrier frequency over a six-octave range.
  • Rate rotary control, which varies the LFO's frequency from 0.1 Hz to 25 Hz.
  • LFO Amount rotary control, which adjusts the amount that the LFO output sweeps the carrier oscillator.
  • Mix rotary control, which crossfades continuously from unmodulated to modulated audio.
  • Drive rotary control, which adjusts the gain of the audio input.
  • Square-Sine rocker switch, which chooses the LFO waveform.
  • Lo-Hi rocker switch, which chooses between the low frequency carrier range (2 Hz to 130 Hz) and the high frequency carrier range (60 Hz to 4,000 Hz).
  • Level, a three-color LED that is used to set the DRIVE control.
  • LFO, a LED that indicates the LFO rate.
  • Bypass, a two-color LED that tells whether the ring modulator is on or bypassed.
  • On/Bypass, a rugged, smooth-acting stomp switch



  • AUDIO IN 1/4" phone jack: accepts any instrument-level or line-level audio signal from -16 dBm to +4 dbm.
  • AUDIO OUT 1/4" phone jack: -4 dBm nominal output level.
  • FREQUENCY, RATE, LFO AMOUNT, MIX:  all of which are stereo 1/4" jacks that accept moogerfooger EP1 (or equivalent) expression pedals, or control voltages from two-circuit or three-circuit 1/4" jacks.
  • AUX AUDIO IN: provides a means of applying an external signal to the ring modulator, in place of the carrier oscillator.
  • LFO OUT jack: delivers the LFO voltage for use by other voltage-controlled devices.
  • CARRIER OUT jack: delivers the carrier signal for use by other devices.
  • +9V POWER INPUT jack: accepts standard 9 volt power adaptors (power adaptor included).


  • CASE: Black panel with hardwood sides
  • DIMENSIONS: 9" x 6" x 2-1/2"
  • NET WEIGHT: 2 lb
  • SHIPPING WEIGHT: 4 lb, including power adaptor and instruction manual.
  • POWER REQUIREMENTS: 105-125 volt, 5W.
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