Nady Systems GEQ 231 - Manual (Page 5)

Before starting to equalize your sound system there
is some information you should know and procedures
you should follow:
• These NADY AUDIO equalizers are equipped
with a BYPASS switch with an LED indicator. If
you disable the BYPASS switch, the LED will turn
off and all equalization settings will be restored. In
bypass mode, the audio signal will flow through
at unity gain.
• Use the range selection switch to select between
a 6db or 12dB level adjust range. The dual color
range LED will indicate green for 6dB and red for
12dB.
• The input level control allows adjustment between
OFF (center detent) and +/-6dB. Note: The unit is
equipped with a red overload LED, which
illuminates when the signal reaches 5dB prior to
clipping. It is normal for the overload LED to flash
occasionally, but if the overload LED is on steady
you must readjust the level control. Below are
some tips to follow while doing the initial set-up.
1. Set channel levels to the center detent (0dB-unity
gain) on the front panel.
2. Enable the BYPASS switch (Note: The red LED is
ON).
3. Set all slide controls to the center detent or 0dB
(unity gain) position.
4. Select the 6dB range switch (green LED ON).
5. Apply signal to the system.
6. Disable the BYPASS switch, red LED OFF.
7. If the CLIP (overload) LED is on you must turn
down the level control.
8. You may now start equalizing your system.
9. Switch the range switch to 12dB (red LED is lit) if
the 6dB range does not provide sufficient gain.
5
Precautions
Protecting yourself from electric shock:
• Never touch the plug with wet hands.
• Always pull out by the plug and never the cord.
• Only let a qualified professional repair the
equipment. An unauthorized person might touch the
internal parts and receive a serious electric shock.
• Never allow a child to put anything, especially
metal, into the equipment.
Protecting your NADY AUDIO Graphic Equalizer:
• Use only a household AC power source. Never use
a DC power source.
• If water is spilled on or in the unit, unplug it and call
for service.
• Make sure that the equipment is well ventilated and
away from direct sunlight
• Avoid damage to the internal circuits and the
external surface by keeping the unit away from
sources of high heat.
• Avoid using spray type insecticide or solvents
near the equipment. It can damage the finish an
might ignite suddenly
• To avoid damaging the finish, never use denatured
alcohol, paint thinner or other similar chemicals to
clean 6 the equipment.
• Place the unit on a flat and solid surface or in a
rack.
• To enjoy your NADY AUDIO graphic equalizer for a
long time, please read this owner’s manual
thoroughly.
Signal Levels
Signal levels from -18dBu to +18dBu are considered
normal. Do not directly connect microphones into the
equalizers. Microphones require a pre amp.
Chassis Grounding
NADY AUDIO equalizers are equipped with a rear
panel ground lift switch. If, after setting up your
system, the system exhibits excessive hum or
buzzing, the problem may be that there is a ground
incompatibility between your equalizer the other
equipment in the same system. There are several
combinations that can be attempted. Note: ALWAYS
TURN YOUR AMPLIFIERS DOWN BEFORE
CHANGING YOUR GROUNDS AROUND. Try
different combinations of lifting grounds with the
ground lift switches or make sure all chassis are
connected to earth ground, either through the A.C.
power cord ground or by the front panel rack mount
screws.