Nady Systems GEQ 231, GEQ 215LF, GEQ131, GEQ 131LF, GEQ 215 User Manual

	20					25	31.5	40	50	63	80	100	125	160	200	250	315	400	500	630	800	1K	1.25K	1.6K	2K	2.5K	3.15K	4K	5K	6.3K	8K	10K	12.5K	16K	20K

+12	10
+6		GEQ 131LF
+3
0	5	31 BAND GRAPHIC EQUALIZER
-3	40		15K	BYPASS	ON
	15	7K	22K		RANGE
-6					OFF
-12	10	3K			POWER
	0	LOW PASS
	HI PASS			CLIP	–6 –12

LEVEL

GEQ 131/ 131LF

Single Channel 31 Band Graphic Equalizer

GEQ 215/ 215LF

2 Channel 15 Band Graphic Equalizer

GEQ 231

2 Channel 31 Band Graphic Equalizer

OWNER’S’S MANUAL

GEQ-Series

GRAPHIC EQUALIZER SERIES

Congratulations!

You have just purchased one of the finest graphic equalizers on the market today. This EQ was developed using the expertise of professional sound engineers and working musicians. You will find your new NADY AUDIO EQ has superior performance and greater flexibility than any other graphic equalizer in its price range.

Read this manual carefully to get the most out of your new EQ. Thanks for selecting NADY AUDIO for your choice in graphic equalizers.

Date of Purchase__________________________

Dealer’s Name____________________________

City_____________________________________

State___________ Zip______________________

Model#__________________________________

Serial #__________________________________

Contents
FEATURES ............................................................................................................................................	3
WARNING..............................................................................................................................................	3
INSTALLATION ......................................................................................................................................	4
Input/Output Connections............................................................................................................	4
Power Connection ......................................................................................................................	4
Precautions..................................................................................................................................	5
Signal Levels ..............................................................................................................................	5
Chassis Grounding ......................................................................................................................	5
OPERATING INSTRUCTIONS ..............................................................................................................	5
FRONT PANEL CONTROLS AND CONNECTIONS ............................................................................	6
REAR PANEL CONTROLS AND CONNECTIONS ..............................................................................	7
TYPICAL SET-UP ..................................................................................................................................	8
Sound Reinforcement Applications..............................................................................................	8
Musical Instrument Application ....................................................................................................	8
Studio Applications ......................................................................................................................	8
SPECIFICATIONS ................................................................................................................................	9

FEATURES		WARNING

GEQ 131/131LF

Single Channel 31 Band Graphic Equalizers

20

25

31.5

40

50

63

80

100

125

160

200

250

315

400

500

630

800

1K

1.25K

1.6K

2K

2.5K

3.15K

4K

5K

6.3K

8K

10K

12.5K

16K

20K

+6

GEQ 131LF

+3

0

5

31 BAND GRAPHIC EQUALIZER

-3

40

15K

ON

CAUTION!

TO REDUCE THE RISK OF FIRE, RE

BYPASS RANGE

15

60

7K

22K

-6

OFF

-12

10

250 3K

50K

POWER

PLACE ONLY WITH SAME TYPE FUSE.

0

HI PASS

LOW PASS

CLIP –6 –12

GEQ 215/215LF

ATTENTION!

UTILISER UN FUSIBLE DE RECHANGE DE

MEME TYPE.

2 Channel 15 Band Graphic Equalizers

WARNING!

TO REDUCE THE RISK OF FIRE OR

ELECTRIC SHOCK. DO NOT EXPOSE

THIS PRODUCT TO RAIN OR MOISTURE.

DO NOT REMOVE CHASSIS (OR BACK).

NO USER-SERVICEABLE PARTS INSIDE.

REFER SERVICING TO QUALIFIED

PERSONNEL.

GEQ 231

2 Channel 31 Band Graphic Equalizer

Graphic Equalizer GEQ Series

•GEQ 131: 1 Channel, Single Rack Space, 31—1/3rd Octave Bands

•GEQ 131LF: 1 Channel, Double Rack Space, 31—1/3rd Octave Bands, Long Throw Faders (60mm travel)

•GEQ 215: 2 Channel, Single Rack Space, 15—2/3rd Octave Bands Each Channel

•GEQ 215LF: 2 Channel, Double Rack Space, 15—2/3rd Octave Bands Each Channel, Long Throw Faders (60mm travel)

•GEQ 231: 2 Channel, Double Rack Space, 31—1/3rd Octave Bands Each Channel

•Active balanced (XLR and 1/4" TRS) and unbalanced (RCA) input/output connectors

•Constant Q bandwidth from each filter with a 3% center frequency accuracy

•Parallel filter design for minimal phase distortion

•Ultra low-noise circuitry

•Variable low-cut and low pass filters, 12dB/octave (GEQ 131/ 131LF/GEQ 231), switchable filters (GEQ 215LF)

•Selectable range 6dB or 12dB

•Variable input level control

•Equalizer ON/OFF bypass switch

•Peak (overload threshold) LED

•Internal power supply with AC input and selectable line voltage (110-240VAC, 50/60Hz)

•Ground lift switch

•Power off automatic bypass function

An equilateral triangle enclosing a lightening flash/arrowhead symbol is intended to alert the user to the presence of uninsulated "dangerous voltage" within the product’s enclosure, which may be of sufficient magnitude to constitute a risk of electric shock.

An equilateral triangle enclosing an exclamation point is intended to alert the user to the presence of important operating and service instructions in the literature enclosed with this unit.

3

INSTALLATION

Power Connection

To ensure years of enjoyment from your NADY AUDIO graphic equalizer, please read and understand this manual thoroughly before using the unit.

These five equalizer models are each designed for mounting in a standard 19" equipment rack or one of the many rack type portable cases available on the market. The units are either single rack (1.75") or double rack (3.5") as noted. All five models are 8.66 inches deep.

Install the equalizer in a rack with the rack screws provided. Route the A.C. power cord to a convenient power outlet away from audio lines. The unit may be turned on and off from the front panel power switch or a master equipment power switch. Since the unit draws a relatively small amount of current during idle, the unit may be left on continuously. NADY AUDIO equalizers do not generate an unduly large amount of heat and do not need to be specially ventilated or cooled. The units should not be subjected, however, to high heat environments.

Each of these five NADY AUDIO graphic equalizers is designed for operation from 120-240 volts, 50-60 Hz AC supplies. Power requirements for electrical equipment differ from area to area. In new installations and portable sound systems, or any situation in which the AC power is in question, it is wise to confirm the voltage and select the appropriate line voltage switch before connecting the instrument to power sources.

Check to see that the unit is set to the voltage for your area by referring to the table below:

Europe (except UK): 230V, 50Hz	VOLTAGE SELECTOR
UK and Australia: 240V, 50Hz	115V				230V
USA and Canada: 120V, 60 Hz	120V				240V
For other areas, please check with
local authorities.

Although the unit’s chassis is shielded against radio frequency (RF) and electromagnetic interference (EMI), extremely high fields of RF and EMI should be avoided.

Input/Output Connections

The 1/4" phone jack, RCA jack, and XLR connector inputs and outputs can be used for balanced and unbalanced connections. CAUTION: Using more than one connector at a time for the INPUT/OUTPUT pair could unbalance balanced lines, cause phase cancellation, short a conductor to ground, or cause damage to the other equipment connected to the equalizer.

For balanced connection,	For unbalanced operation,
wire the connectors as follows:	wire the connectors as follows:

Paralleling inputs and outputs may be accomplished by using any of the 3 connectors.

Note: The 1/4" TRS are normally used for this function.

If the voltage selector is not set for your area: Confirm that the power cord is not plugged into a wall outlet. Move the voltage selector switch with a small screwdriver so that the marker is set to the voltage for your area.

4