Electro-Harmonix GERMANIUM4 BIG MUFF PI User manual

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GERMANIUM4BIG MUFF PI
Dual Vintage Distortion and Overdrive
Congratulations on your purchase of the GERMANIUM4BIG MUFF
PI. The GERMANIUM4BIG MUFF PI is a new and versatile
overdrive/distortion that captures the essence of the warm sound
unique to the germanium transistors from the ‘60s. The
GERMANIUM4BIG MUFF PI is two independent circuits, one a
distortion and one an overdrive, each with completely independent
controls. The two circuits can be used separately or together. Each
circuit has its own independent ON/OFF bypass footswitch.
-CONTROLS-
DISTORTION SIDE: The DISTORTION side can be used
independently or with the OVERDRIVE side. When both sides are
ON, the DISTORTION side precedes the OVERDRIVE side in the
signal chain. The DISTORTION utilizes two germanium transistors
and is capable of going from clean - to a gritty overdrive - to a full
on distortion and beyond.
GAIN CONTROL –This knob adjusts the amount of preamp gain
for the DISTORTION side of the pedal. As you turn the GAIN knob
clockwise the distortion and volume will increase dramatically.
BIAS CONTROL –This knob adjusts the character of the distortion
by changing the bias of the signal before it is distorted by the
Germanium transistors. Turning the BIAS knob counter-clockwise
will result in a more mellow and compressed tone. Turning the
BIAS knob clockwise will result in an edgy and more aggressive
tone.

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VOLTS CONTROL –This knob adjusts the amount of voltage
supplied to the DISTORTION side only. When the VOLTS knob is
turned fully clockwise, the circuit is receiving the full voltage.
Turning the VOLTS knob counter-clockwise will simulate a dying
battery. As the voltage is lowered, the signal will become more
compressed, and start to clip, creating a wide range of sonic
textures to work with. NOTE: As the VOLTS knob is turned, the
sound may momentarily dip in volume as the signal adjusts to the
new voltage setting.
VOLUME CONTROL –This knob controls the output level of the
DISTORTION side of the pedal. Fully counter-clockwise will produce
no sound. As the VOLUME knob is turned clockwise, the output
level will increase to its maximum volume at the full clockwise
setting.
OVERDRIVE SIDE: The OVERDRIVE side can be used
independently or with the DISTORTION side. When both sides are
ON, the OVERDRIVE side follows the DISTORTION side in the signal
chain. The overdrive utilizes two germanium transistors and can go
from a nice fattening boost to a warm overdrive. The overdrive
reacts differently to different input levels. Using hotter pickups, or
having the DISTORTION side on will add a variety of tonal options.
GAIN CONTROL –This knob adjust the amount of gain in the two
germanium transistor preamp gain stage for the OVERDRIVE side.
The gain will increase as the GAIN knob is turned clockwise.
Overall, there is less gain available on this side than the
DISTORTION side. The overall character of the gain will change
depending on how the BIAS control is set.
BIAS CONTROL –This knob adjusts the character of the distortion
by changing the bias of the signal in the preamp section of the
overdrive circuit. When the BIAS knob is at noon, the sound will be
the clearest and most dynamic. When the BIAS knob is fully
counter-clockwise, the sound will be more compressed. When the
BIAS knob is fully clockwise, the sound will start to clip and can add
a great vintage grit to the overdrive.

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TONE CONTROL –This knob is a single knob tone control. As the
TONE knob is turned clockwise, the tone of the OVERDRIVE side will
change from a low end emphasis to a high end emphasis.
VOLUME CONTROL –This knob controls the output level of the
OVERDRIVE side of the pedal. Fully counter-clockwise will produce
no sound. As the VOLUME knob is turned clockwise, the output
level will increase to its maximum volume at the full clockwise
setting.
STATUS LED and FOOTSWITCH (DISTORTION) –When this
LED is lit; the GERMANIUM4BIG MUFF PI DISTORTION effect is
active. When the LED is off, the DISTORTION side is in True Bypass
Mode. The footswitch engages/disengages this effect. The
footswitch controls the true bypass ON/OFF for the DISTORTION
side.
STATUS LED and FOOTSWITCH (OVERDRIVE) –When this
LED is lit; the GERMANIUM4 BIG MUFF PI OVERDRIVE effect is
active. When the LED is off, the OVERDRIVE side is in True Bypass
Mode. The footswitch engages/disengages this effect. The
footswitch controls the true bypass ON/OFF for the OVERDRIVE
side.
INPUT Jack –Connect your instrument to the input jack. The
input impedance of the GERMANIUM4 BIG MUFF PI is 200K ohms.
OUTPUT Jack –Connect this jack to your amplifier.
9V POWER JACK –The GERMANIUM4BIG MUFF PI can run off of
a 9V battery or you can connect a 9VDC battery eliminator capable
of delivering at least 100mA to the 9V power jack. The optional 9V
power supply from Electro-Harmonix is 9.6DC-200BI (same as used
by Boss™ & Ibanez™) 9.6 Volts DC 200mA. The power supply must
have a barrel connector with center negative. The battery may be
left in or taken out when using a power supply. The current draw
for the GERMANIUM4BIG MUFF PI is 12mA.

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