User Manual

Controlling the EQ-1A plug-in parameters
EQ-1A is a processor that emulates a vintage EQ that is considered the classic passive EQ. It uses a distinctive
style of operation, with controllable boost and attenuation (cut) for each of two regions, low and high. The
frequency response is completely different from that of a typical EQ, giving this model its unique character.
The input/output circuit and vacuum tubes also give the sound an extremely musical character, producing a
well-balanced sound.
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a
IN switch
Switches the processor on/off. If this is off, the filter section is bypassed but the signal passes through the
input/output transformer and amp circuit.
b
LOW FREQUENCY knob
Adjusts the frequency of the low-range filter.
c
(LOW) BOOST knob
Adjusts the amount of boost for the frequency region specified by the LOW FREQUENCY knob.
d
(LOW) ATTEN knob
Adjusts the amount of attenuation for the frequency region specified by the LOW FREQUENCY knob.
e
BAND WIDTH knob
Specifies the width of the band controlled by the high-range filter. Turning the knob toward the right (Broad)
makes the band wider and also lowers the peak level. This affects only the response of the boost.
f
HIGH FREQUENCY knob
Adjusts the frequency of the high-range filter. This affects only the response of the boost.
g
(HIGH) BOOST knob
Adjusts the amount of boost for the frequency region specified by the HIGH FREQUENCY knob.
h
(HIGH) ATTEN knob
Sets the amount of attenuation applied to the frequency band specified by the ATTEN SEL knob.
i
(HIGH) ATTEN SEL knob
Switches the frequency band to which attenuation is applied by the ATTEN knob.
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Plug-ins > Controlling the EQ-1A plug-in parameters