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MXR M173

Classic 108 Fuzz Guitar Effects Pedal

MXR M173 Classic 108 Fuzz Guitar Effects Pedal

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  • MXR M173 Classic 108 Fuzz Guitar Effects Pedal
  • MXR M173 Classic 108 Fuzz Guitar Effects Pedal
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Product Description for the MXR M173

The Classic 108 Fuzz features the guts of our BC-108-loaded Fuzz Face® Distortion with modern MXR upgrades and a Buffer switch so that it plays well with wahs.

Guitarists of all styles will dig the familiar late-Sixties/ early-Seventies crunch delivered by the new MXR Classic 108 Fuzz. We've taken the guts of our BC-108 loaded Fuzz Face, placed them in a more pedal-board friendly shape, and added the modern conveniences of a battery door, optional AC operation, and true bypass with LED. The Buffer switch eliminates the audible oscillation caused when some wah-wahs are placed in front of a Fuzz Face. The Classic 108 Fuzz comes in a heavy-duty Phase 100-sized box with a sweet hammertone turquoise finish.



  • BC108 Fuzz Face® circuitry in a pedal-board friendly chassis
  • Original Fuzz Face hammertone turquoise finish
  • True bypass


The MXR Classic 108 Fuzz is powered by one 9-volt battery (remove bottom plate to install), a 9-volt AC Adapter such as the Dunlop ECB003/ECB003EU or  a power supply such as the DC Brick.


  • Run a cable from your guitar to the Classic 108 Fuzz’s INPUT jack and run another cable from its OUTPUT jack to your amplifier.
  • Start with all controls at 12 o’clock.
  • Turn the effect on by depressing the footswitch.
  • Rotate the FUZZ knob clockwise to increase amount of fuzz or counterclockwise to decrease it
  • Rotate the VOLUME knob clockwise to increase overall effect volume or counterclockwise to decrease it.
  • Engage the BUFFER switch to eliminate the oscillation that sometimes occurs when a wah wah is in front of the Classic 108 Fuzz. You may notice a brightening of the fuzz tone.


  • Input Impedance
  • Buffer ON : 800 kΩ
  • Buffer OFF : 10 kΩ
  • Output Impedance at 1 kHz
  • Max Volume : 16 kΩ
  • -6 db Volume : 160 kΩ
  • Max Output Level : -4 dBV
  • Max Gain at 1 kHz : 55 dB
  • Bypass : True Hardwire
  • Current Draw : 2.2 mA
  • Power Requirement : 9 volts DC
  • ·


  • VOLUME knob controls overall effect volume
  • FUZZ knob controls amount of fuzz
  • BUFFER switch removes high-end roll off and oscillation caused by some wah wahs
  • FOOTSWITCH toggles effect on/bypass (blue LED indicates on)
Brand MXR
Weight 1.6000
Dimensions (WxHxD) No

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