Nady Systems GEQ 231, GEQ 131LF, GEQ 215LF Precautions, Signal Levels, Chassis Grounding

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.

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.

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