Nady Systems GEQ 131LF User Manual

By routing the signal from the mixer to the main
power amplifiers (or crossover), the overall frequency
of the mix may be altered to do a number of things.
A. Through the use of a real-time audio spectrum 

analyzer, a calibrated microphone, and a pink 
noise source, the audio system may be "TUNED" 
to make the overall audio spectrum response of 
the audio reinforcement system and the room
environment flatter in its frequency response.   

B. By turning up the audio reinforcement system to 

the feedback point, then attenuating the oscillating
frequency (1/3 octave resolution), then turning 
the system up to attenuate the 2nd oscillating
frequency, and then the 3rd, and so on, you can 

enable the entire audio system to have much

more gain before feedback.

C. Amplifiers and speakers may be protected by the

use of the LOW CUT feature of the equalizer.
Wind noise or the loud percussive sound of
dropped microphones, etc., could potentially
cause damage to the amps and/or speakers.  By
rolling off the extreme LOW frequencies with the
LOW CUT filter, a measure of protection is added
to the system without severely affecting the overall
sound quality.

D. In noisy environments, the audio signal may be

tailored for better intelligibility and penetration.
This is especially useful for public address
systems. 

E. Creative use of the equalizer allows shaping of the

signal for a more pleasing sound or for special
effects. The only limits are those of taste and
imagiation.

8

NADY AUDIO graphic equalizers may be used wher-
ever modification of the frequency contour of a sound
system is needed. A graphic equalizer is a solution to
any number of sound problems or creative urges.

A. Putting an equalizer in line with a musical

instrument allows you to modify the sound of the
instrument.  You can brighten the sound, or add
body to a thin sounding instrument, or even give
the sound a totally different character.

B. An equalizer will allow you to eliminate unwanted

sounds, like a 60-cycle HUM from a badly
grounded amplifier. 

A graphic equalizer is one of the most useful tools in
the sound engineer’s bag.  NADY AUDIO equalizers
offer the features and flexibility to perform where it
counts in the studio.
A. Fix a track that doesn’t sound quite right.  Put the

equalizer in an effects send and return it to the
MIX bus.

B. Create an artificial stereo by splitting a monaural

signal and equalizing the split signals differently, 
then panning one equalized signal to the right and
the other signal to the left.  

C. Shape the sound by changing the frequency

response of the track.

D. Special effects, like a telephone sound, can be

created by cutting off the LOW end to 200Hz and 
the HIGH end to 6KHz.

E. Also when you use the equalizer with other pieces

of equipment, such as the NADY AUDIO CL-5000
Compressor Limiter with Gate, you can do real
signal processing magic.  Emphasizing the HIGH
frequencies of a signal and feeding the modified
signal to the side chain of the compressor makes
the compressor a DE-ESSER; or, emphasizing the
LOW frequencies and putting that through the side
chain, makes the compressor a "DE-THUMPER".
Also, you can reduce unwanted frequency-
dependent noise in a signal by cutting the
offending frequencies with an equalizer and letting
the noise gate of the CL-5000 "KEY" on the
modified signal, while letting the original signal
pass and gating the unwanted sounds. (See the
instruction manual for the NADY AUDIO CL-5000
for more ideas and detail on methods to utilize
your equalizer in the fullest).