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  • MXR-M288
  • MXR-M288

MXR M288 Bass Octave Deluxe Pedal

Constant Headroom Technology. Two independent octave voices. Organic analog tone. True bypass.

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Out of stock

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Product Description for the MXR M288 Bass Octave Deluxe Pedal

The Bass Octave Deluxe offers two independent analog sub-octave voices with a Dry control and a Mid+ switch to optimize the sound of your parallel clean signal.

The Bass Octave Deluxe is a dual-voice octave pedal that offers analog tone, true bypass, and a variety of tonal options. MXR's 18 volt Constant Headroom Technology™ provides high headroom and superior tracking. Use the Dry knob to mix in your direct signal, and hit the Mid+ switch to add up to +14dB of internally adjustable mid frequencies (400Hz or 850Hz). Finally, mix in two separately controlled octave voices-Growl (for throaty tone) and Girth (for deep tone).



  • Two independent sub-octave voices
  • MID+ switch adds mid range boost
  • Constant Headroom Technology™ for exceptional headroom and tracking
  • Organic analog tone
  • True bypass


The MXR Bass Octave Deluxe 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 DC Brick power supply


  • Run a cable from your guitar to the Bass Octave Deluxe’s INPUT jack and run another cable from the Bass Octave Deluxe’s OUTPUT jack to your amplifier.
  • Start with all controls at 12 o’clock.
  • Turn the effect on by depressing the footswitch.
  • Rotate DRY knob clockwise to increase level of dry signal or counterclockwise to decrease it.
  • Rotate the GROWL knob clockwise to increase level of throaty midrange sub-octave voice or counterclockwise to decrease it.
  • Rotate the GIRTH knob clockwise to increase level of smooth, deep sub-octave voice or counterclockwise to decrease it.
  • Depress MID+ switch to boost midrange. Frequency and level are both adjustable via internal slider (up for 850Hz, down for 400Hz) and trim pot (+4dB when fully clockwise, +14dB fully counterclockwise


  • Input Impedance : 1 MΩ
  • Output Impedance : < 600 Ω
  • Noise Floor* : 85 dB
  • Octave Bandpass
  • -3 dB, 8 Hz to 46 Hz
  • Control Range Dry : -∞ to +2.5 dB Girth : -∞ to +1 dB Growl : -∞ to +6 dB
  • MID+ Switch** Gain : +4 dB to +14 dB

Frequency : 400 Hz or 850 Hz

  • Bypass   : True Hardwire
  • Current Draw : 14 mA
  • Power Supply : 9 volts DC


  • MID+ switch adds up to +14dBof internally adjustable midrange(blue LED indicates on)
  • DRY knob controls volume ofclean bass signal
  • GROWL knob controls volume of throaty, midrange sub-octave voice
  • GIRTH knob controls volume of deep and smooth sub-octave voice
  • FOOTSWITCH toggles effect on/ bypass (blue LED indicates on)
Brand MXR
Weight 1.0000
Dimensions (WxHxD) No


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