Resonance Frequency
2-pole 4-pole
Xerograph
lowpass filter
In
Out
IE
The Xerograph is a foot-sweepable, resonant
lowpass filter. It can be used for a variety of
sounds, from resonant synth sweeps, to fast funk
sounds, to deep reggae/dub tones.
-2-pole/4-pole switch:
-2-pole mode is a brighter, more
subtle filter with a wide
resonance peak.
-4-pole mode offers a fat, deep, and
synthy filter with a sharp resonance
peak.
-Frequency knob:
When using the filter without an expres-
sion pedal, this control sets the cutoff frequency
of the filter, allowing you to dial in deep, dubby
bass sounds. When using an expression pedal
with the Xerograph, the Frequency knob sets the
low extent of the filter sweep.
Resonance knob:
Boosts frequencies around the cutoff
frequency, which intensifies the effect of the
filter. Set the resonance low for more subtle
tone-shaping, or turn it up to around 3-o’clock
for wet synth sound. Turning it to maximum
sends the filter into self-oscillation.
Volume knob:
The Volume knob allows for the effect volume to
be either louder or quieter than the bypassed
signal, and to correct for volume loss that may
happen as a result of heavy filtering.
Volume
Front view of the Xerograph
in standard configuration
Frequency expression jack:
Connecting a passive expression
pedal to the expression jack allows you to
control the frequency of the filter with your
feet, allowing for slow, resonant sweeps, or
fast, funky squelches.
Recommended expression pedals:
Moog EP-2
Iron Ether modded EBJR volume pedal
Note: standard Xerographs DO NOT accept
control voltages (CV) into the expression
jack. Contact us if you require voltage
control. Never plug a control voltage into the
Xerograph’s expression jack. At best, it won’t
work. At worst, it will kill your Xerograph.
Power jack:
Runs on industry-standard 9 volt DC center
negative power supply. Does not accept
batteries.
9v DC Expression
Rear view of the Xerograph
