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MXR M134 Stereo Chorus Pedal

Gorgeous-sounding Stereo Chorus Pedal


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  • MXR-M134SC
  • MXR-M134SC
  • MXR-M134SC
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Product Description for the MXR M134 Stereo Chorus Pedal

The Stereo Chorus delivers lush analog chorus several controls to shape the tone of the effect and preserve low end frequencies.

This gorgeous sounding pedal will remind you how cool chorus can be. Set the Rate and Width controls to your liking and then dial in as much effect as you want with the Intensity knob. You can then shape the tone even further by EQ-ing the modulated frequencies with the Bass and Treble controls. Run in mono or use the stereo outputs for a huge, vibrant sound. If you're looking to preserve the low end of your guitar tone, the Stereo Chorus has got you covered with its Bass Filter button that applies the effect to the high frequencies only.



  • Rich analog chorusing
  • Bass and Treble controls for shaping chorus tone
  • Bass Filter switch for increased low end clarity
  • Analog bucket-brigade technology


The M134 Stereo Chorus is powered by two 9-volt batteries, a 18-volt AC adapter such as the Dunlop ECB004/ECB004E, or a DC Brick™ power supply.


  • For mono operation, run a cable from your guitar to the Stereo Chorus’ INPUT jack and run an other cable from the Stereo Chorus’ MONO OUTPUT jack to your amplifier. To run the  Stereo Chorus in stereo, run an additional cable from the pedal’s STEREO OUTPUT  jack to a second amplifier.
  • Start with all controls at 12 o’clock.
  • Turn the effect on by depressing the footswitch.
  • Rotate the BASS knob clockwise to boost low end frequencies or counterclockwise to cut them.
  • Rotate the TREBLE knob clockwise to boost high end frequencies or counterclockwise to cut them.
  • Rotate the INTENSITY knob clockwise to increase chorus intensity or counterclockwise to decrease it.
  • Rotate the WIDTH knob clockwise for a wider chorusing sweep range or counterclockwise for a narrower range.
  • Rotate the RATE knob clockwise to increase chorusing speed or counterclockwise to decrease it.
  • To reduce chorusing on low end frequencies, press the BASS FILTER switch.


  • Input Impedance : 2.2 MΩ
  • Output Impedance : 3.3 kΩ
  • Maximum Input Level* : +10 dBV, 1 kHz
  • Maximum Output Level : +13 dBV
  • Noise Floor** : -100 dBV

Tone Control

  • BASS : ±12 dB, 100 Hz
  • TREBLE : ±12 dB, 3 kHz
  • Rate Control : 0.1 Hz to 10 Hz
  • Total Harmonic Distortion : <0.1%
  • Maximum Delay : 16 ms
  • Maximum Phase Shift : 2.88 k degrees, 1 kHz
  • Noise Reduction : 2:1
  • Frequency Response : 20 Hz to 20 kHz, ±1 dB
  • Bypass : Buffered
  • Current Draw : 26 mA
  • Power Supply : 18 volts DC


  • BASS FILTER switch reduces chorusing on low end
  • BASS knob controls how much low end is cut or boosted
  • TREBLE knob controls how much high end is cut or boosted
  • INTENSITY knob controls overall amount of chorusing
  • WIDTH knob controls chorusing sweep range
  • RATE knob controls speed of chorusing effect
  • FOOTSWITCH toggles effect on/ bypass (red LED indicates on)
Brand MXR
Weight 2.4000
Dimensions (WxHxD) na

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