Electro-Harmonix Little Big Muff Pi Instruction Manual

Congratulations! You have just purchased the finest harmonic
distortion-sustain device developed to date for the electric guitar
player, now in a compact pedal. The Little Big Muff Pi is identical to
our Big Muff Pi but smaller. We took the classic Big Muff circuit and
simply shrunk it without any change to the sweet violin-like
sustaining sound. It's the same legendary sound created by Jimi
Hendrix.

-CONTROLS-

VOLUME CONTROL— sets the output level.

SUSTAIN CONTROL— adjusts the amount of sustain and distortion.

TONE CONTROL— provides a range of sounds from high treble to deep

bass.

-OPERATION AND WARNINGS-

Power, from the internal 9-volt battery or external battery eliminator, is
activated by plugging into the input. The input cable should be removed
when the unit is not in use to avoid running down the battery. The input
impedance presented at the Input Jack is 130 kohms. The output impedance
at the Output Jack is 10 kohms.

The barrel connector on the front of the Big Muff Pi is for a 9-volt battery
eliminator capable of delivering 100 mA of current. The inner ring of the 9-

volt battery eliminator must be negative, the outer ring positive. The unit’s
battery may be left in or taken out when the eliminator is in use.
To achieve its long sustain, the Big Muff Pi has very high maximum gain.
This requires that both the pickups and cables be well shielded and properly
grounded to avoid excessive hum when high sustain control settings are
used.

To change the 9-volt battery, you must remove the 4 screws on the bottom
of the Little Big Muff Pi. Once the screws are removed, you can take off the
bottom plate and change the battery. Please do not touch the circuit board
while the bottom plate is off or you risk damaging a component.