THE LONG STORY

The Sub Octave Bass Fuzz dishes out thunderous low end with earth-shaking fuzz. To create this sonic behemoth, MXR’s engineers combined the Growl section of the Bass Octave Deluxe with a long-forgotten fuzz circuit. With three separate output level controls for the fuzz, sub octave, and dry signals, you can create your own recipe of subterranean tones without sacrificing any of your instrument’s natural sound. Further versatility comes in the form of the fuzz section’s tone controls and two switchable voices—warm and compressed or bright and aggressive—along with the Mid Level control, which allows you to give your dry signal some more punch in the midrange.

CONTROLS

1. BYPASS footswitch toggles effect on/bypass (white LED indicates on)
2. TREBLE knob cuts/boosts fuzz signal’s high end frequencies
3. BASS knob cuts/boosts fuzz signal’s low end frequencies
4. GAIN knob controls intensity of fuzz signal
5. FUZZ switch toggles between two fuzz modes
6. FUZZ knob controls volume of fuzz signal
7. SUB OCTAVE knob controls volume of sub octave signal
8. MID+ LEVEL knob sets amount of dry signal’s midrange boost
9. 9 DRY knob controls volume of unaffected dry signal
10. OCTAVE footswitch toggles sub octave signal on/off (blue LED indicates on)

DIRECTIONS

• Run a cable from your guitar to the M287’s INPUT jack and run another cable from the M287’s OUTPUT jack to your amplifier.
• Set all knobs to their 12 o’clock position.
• Turn the pedal on by depressing the BYPASS footswitch.
• Push the FUZZ switch to choose between a bright fuzz mode (indicated by blue LED) that accentuates upper frequencies and and a warm fuzz mode (indicated by red LED) that accentuates low end fundamental frequencies.
• Rotate the FUZZ knob clockwise to increase volume of fuzz signal or counterclockwise to decrease it.
• Rotate GAIN knob clockwise to increase the intensity of the fuzz effect or counterclockwise to decrease it.
• 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.
• Engage the sub octave signal by depressing the OCTAVE footswitch.
• Rotate the SUB OCTAVE knob clockwise to increase volume of sub octave signal or counterclockwise to decrease it.
• Rotate the DRY knob clockwise to increase volume of dry signal or counterclockwise to decrease it.
• Rotate the MID+ LEVEL knob to increase midrange boost or counterclockwise to decrease it

SPECIFICATIONS

• Input Impedance ~1MΩ
• Bypass True Hardwire
• Noise Floor >94dBV*
• Output Impedance <1kΩ
• Octave Frequency -3dB at 20 Hz to 80 Hz
• Bandpass 
• Dry Gain -∞/+8.8dB
• Mid Level
• 0 -> +15dB @ 420Hz w/SW1 rt. pos.
•  0 -> +13dB @ 840Hz w/SW1 left pos.
• Octave Gain -∞/+17dB @ 80Hz
• Fuzz Gain (Blue) -∞/+12.8dB @ 420Hz
• Fuzz Gain (Red) -∞/+10dB @ 4.3kHz
• Fuzz EQ
•  Bass -10dV -> +10dB @ 420Hz
•  Treble -10dB -> +10dB @ 4.3kHz