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5.2 Equalizer In Sound Reinforcement Systems
The EQU Series Graphic Equalizers can be used in the sound reinforcement systems to :
Eliminate unwanted sounds, such as the 60Hz Hum noise.
Shape the sound by changing the frequency response of the track.
Special effects like telephone sounds are done by cutting off the low end to 200Hz and the high end
to 6KHz.
Allow you to modify the sound of the instrument if put EQU Series Equalizer in line with a musical
instrument. you can brighten the sound, and body to a thin sounding instrument, or you can give the
sound a totally different character.
Fix a track that does not sound quite right, put the EQU Series Equalizer in an effects send and return
it to the mix bus.
The following connection is probably most common field of application:
The EQU Series Graphic Equalizer can also be used on a single instrument by connecting to a mixing
console's main inserts, esp for those consoles without built-in equalization circuitry.
a. For mono application, please use the EQU131, EQU131VU mono Graphic Equalizer.
b. For stereo application, please use the EQU215, EQU2215, EQU231LED, EQU231VU or
EQU231TWIN stereo Graphic Equalizer, either of the two channels can be used as L/R input
& output.
NOTE: Mono/Stereo Application
- Mixing Console
The EQU Series Graphic Equalizer can be used on an entire mix "In-line" between a instrument outputs
and a power amplifier, and this is the basic application in the PA system to offer precise Equalization
control.
MIXINGCONSOLE
CH1IN
CH1OUT
CH2IN
CH2OUT
MainInserts
Channel One
Channel Two
20 31.5 50 100 200 500 1.25K 2.5K 6.3K 12.5K25 40 80 160 400 1K 2K 5K 10K63 125 315 800250 630 1.6K 4K3.15K 8K 16K 20K
LEVEL
BY-PASS RANGE
HI-PASS
LOW-PASS
CLIP
40Hz 16 KHz
BY-PASS RANGE
HI-PASS
LOW-PASS
CLIP
40Hz 16 KHz
POWER
EQU231LED
Dual 31 Band Graphic Equalizer
ON
OFF
20 31.5 50 100 200 500 1.25K 2.5K 6.3K 12.5K25 40 80 160 400 1K 2K 5K 10K63 125 315 800250 630 1.6K 4K3.15K 8K 16K 20K
LEVEL
12
12
6
6
LTO
R
- Line Instrument
Channel One
Channel Two
20 31.5 50 100 200 500 1.25K 2.5K 6.3K 12.5K25 40 80 160 400 1K 2K 5K 10K63 125 315 800250 630 1.6K 4K3.15K 8K 16K 20K
LEVEL
BY-PASS RANGE
HI-PASS
LOW-PASS
CLIP
40Hz 16 KHz
BY-PASS RANGE
HI-PASS
LOW-PASS
CLIP
40Hz 16 KHz
POWER
EQU231LED
Dual 31 Band Graphic Equalizer
ON
OFF
20 31.5 50 100 200 500 1.25K 2.5K 6.3K 12.5K25 40 80 160 400 1K 2K 5K 10K63 125 315 800250 630 1.6K 4K3.15K 8K 16K 20K
LEVEL
12
12
6
6
LTO
R
Fromline instrument
outputs
To power amplifierinputs
CH1IN
CH2IN
CH1OUT
CH2OUT
0
-
0dB
+17
+12 +6
-12
-6
0
-
0dB
+17
+12 +6
-12
-6
0
-
0dB
+17
+12 +6
-12
-6
0
-
0dB
+17
+12 +6
-12
-6