P. 5
- AUDIOLAB EQ-2231
English version
3. OPERATING CONTROLS
Input Gain Control
: This control sets the signal
level to the equalizer. It is capable of -12dB to
+12dB of gain. Its effect is apparent by viewing the
OUTPUT LEVEL BAR GRAPH.
EQ Bypass:
This switch removes the graphic
equalizer section from the signal path. ( See Block
diagram on Page 8.) The BYPASS switch does not,
however, affect the INPUT GAIN, or LOW CUT
filters.
EQ Bypass LED:
This red LED lights when the EQ
is in bypass mode. Note that bypass mode only
effects the graphic equalizer section of the 20 Se
-
ries EQs. The INPUT GAIN and LOW CUT controls
remain unaffected when the EQ is bypassed.
Boost/Cut Range Selection Switch and LEDs: This
switch selects which of the two boost/cut ranges
the equalizer will use, either ±6dB or ±15dB. The
red LED lights when the ±15dB range is selected,
and the yellow LED lights when the ±6dB range
is selected. Note that the BOOST/CUT switch is
slightly recessed. This is to prevent accidental
activation of the switch, possibly causing damage
to other sound system components.
Output Level Bar Graph:
These four LEDs indi-
cate output level of the equalizer. The red LED is
3dB below clip-ping and is marked as +18dBu. It
monitors the level at the output of the equalizer
after all other process ing, including the limiter.
Clip LED:
This LED lights whenever any internal
signal level reaches 3dB below clipping which
may occur when any of the following happen: 1)
the input signal is "hotter" than +22dBu, 2) ex-
cessive gain is applied by the input gain control,
or 3) excessive boost is applied using the fre-
quency sliders.
Gain Reduction Meter:
These four LEDs indi-
cate the amount of gain reduction being induced
by the setting of the PeakPlus' LIMITER THRESH-
OLD control as the signal level from the graphic
EQ section exceeds this limiter threshold setting.
PeakPlus' Limiter Threshold Control: This con-
trol engages the PeakPlus'M limiter. It sets the
threshold level at which -:1 gain reduction will
begin to occur. Its design is borrowed from the
patent-pending PeakStopPlus'M Limiter found
on the popular compressor/limiters. It is capa-
ble of a range of OdBu through "OFF" (+24dBu).
When the threshold control is set to "OFF", the
limiter is effectively disabled, and no gain reduc
-
tion will occur.
