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FEATURES
a. 24-Bit Digital Signal Processing. The EQD 312 utilizes 24-Bit resolution for accurate
processing of analog signals.
b. Dual 31 band Equalizers. Each channel of the Graphic Equalizer section of the
EQD 312 is comprised of 31 digital EQ encoders. These digital EQ encoders are
rd
centered in 1/3
octave increments from 20Hz to 20kHz.
c. Separate High Pass & Low Pass Filter for each channel. Each channel of the
EQD 312 is provided separate High and Low Pass filters. The Low Pass Filter is
variable from 10kHz to OFF. The High Pass Filter is variable from 10Hz to 410Hz.
d. Expander. Each channel has separate Expander for ratio/
minimize system noise.
e. Limiter. Each channel of the EQD 312 is equipped with a "Brick-wall" limiter, with a
Threshold control to provide protection from extreme transients. This feature is
designed to protect the system components and the listener.
f.
HI Q. Selecting HI Q alters the characteristics of the equalization of the EQD 312. The
center frequency remains fixed for both Normal Q and HI Q; However, in HI Q the
effect on adjacent frequencies is less pronounced. Normal Q is 1/3
(Q=4.32) and HI Q is 1/8
g. Range. The degree of control of the digital encoders in the EQD 312 Graphic
Equalizer section can be altered by engaging the Range control switch located in the
Dynamics/Master control section. A choice of +/-6dB, +/-12dB, +12/-24dB can be
chosen by pressing the Range switch. The selected Range is indicated by LED's
located at the extreme right side of the Graphic Equalizer section. Changing the
Range selection for a channel changes the range for all EQ encoders on a channel.
h. Bypass. Engaging the Bypass switch routes the signal from input to output by way of a
hard-wire bypass (On-board metering continues to monitor processed signal; not
bypassed signal).
i.
4 User-Programmable Presets. Four user-determined setups can be stored in the
EQD 312. This is accomplished by storing the settings of the various controls of the
front panel of the unit into one of the four preset positions provided for this purpose. A
store switch and a Preset switch can be found in the Dynamics / Master control
section to activate this feature. Preset switch cycles through the Four Presets and the
Manual position.
j.
AHC-Adaptive Hum Cancellation. This is a proprietary feature of EQD 312. Annoying
50Hz / 60Hz system hum caused by grounding problems can be greatly reduced
without effecting program content by simply engaging AHC.
k. Channel A Master. The Channel A Master switch slaves the controls of Channel B to
Channel A for ease of setup.
CONTROL AND CONNECTIONS
A
FRONT PANEL LAYOUT
The front panel of the EQD 312 is divided into two sections:
th
octave bandwidth (HI Q=11.54).
control to
Threshold
rd
octave bandwidth
3
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