VSP-V-9975
Issue 4
V-9975
SEVEN BAND EQUALIZER
INTRODUCTION
These instructions contain the specifications and
information necessary to install, operate, and
maintain the V-9975, Seven Band Equalizer.
SPECIFICATIONS
Features
•
•
•
•
•
•
7 active filters
Modified 1 octave equalization
+ 12 dB boost or cut
Constant Q equalization
Power "ON" indicator
Bypass switch to remove EQ from circuit
(slide type)
Environment
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•
High impedance output
Line output
•
•
Temperature:
Humidity:
0 to 50 Degrees C
0-85% non-precipitating
Nominal Specifications
OPERATION
•
Type of Inputs:
Hi impedance 10K Ohms (unbalanced)
Stereo HiZ 10K Ohms (unbalanced)
The V-9975 is used to boost or attenuate specific
frequencies to improve voice intelligibility or
attenuate frequencies to help reduce feedback. The
unit can also be used to modify the frequency
response of speakers.
•
Type of Outputs:
Line (balanced)
Hi impedance 10K Ohms (unbalanced)
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•
•
Frequency Response:
Distortion:
Frequency Centers:
35Hz-20kHz +1dB
< 0.3%
A "POWER" indicating LED, 7 slide controls (1 for
each of the bands), and an "EQ" bypass switch are
located on the front of the unit. The frequencies
boost/cut (1 to 12 dB), are modified with each filter's
slide control. The manual "EQ" bypass switch allows
comparison of before equalization, and after effect, in
the area being equalized. All frequency adjustments
are bypassed when the "EQ IN/OUT" switch is in the
"OUT" position.
Band 1 = 60 Hz
2 = 200 Hz
3 = 560 Hz
4 = 1100 Hz
5 = 2200 Hz
6 = 4500 Hz
7 =10000Hz
Power Requirements
•
•
-24VDC
150 mA
INSTALLATION
Connections are accomplished utilizing (3) phono
jacks (2 input, 1 output) and/or (9) screw terminals.
Only qualified service personnel should install the
V-9975. See Figures 1 and 2 for actual connections.
After all connections are made and slide controls
adjusted to the desired positions, close security cover
and tighten locking screws. All connections should
be made and double checked before DC power is
supplied to the unit.
Dimensions/Weight
•
5.7" H x 8.1" W x 2.5" D
(14.5cm W x 20.6cm H x 6.4cm D)
2.8 lbs. (1.27 kg)
•
1
947006
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FIGURE 1 - CONNECTIONS
60 H z
200 H z
560 H z
1100 H z
2200 H z
4500 H z
10 kH z
+12 dB
+6 dB
0 dB
POW ER
-6 dB
-12 dB
60 H z
200 H z
560 H z
LIN E OU T
AU D IO OU TPU T
AU D IO IN PU T GN D GN D GN D
1100 H z
2200 H z
4500 H z
10 kH z
EQ
IN OUT
GN D
-24VD C
N OT FOR U SE W ITH
TALKBAC K SPEAKER S
AU D IO
IN L.
AU D IO
IN R .
AU D IO
OU T
-24VD C
POW ER
SU PPLY
GN D
LEFT
R IGH T
TO BAC KGR OU N D
MU SIC IN PU T
OU TPU T
M USIC SOURCE
FIGURE 2 - CONNECTIONS
60 H z
200 H z
560 H z
1100 H z
2200 H z
4500 H z
10 kH z
+12 dB
+6 dB
0 dB
POW ER
-6 dB
-12 dB
60 H z
200 H z
560 H z
LIN E OU T
AU D IO OU TPU T
AU D IO IN PU T GN D GN D GN D
1100 H z
2200 H z
4500 H z
10 kH z
EQ
IN OUT
GN D
-24VD C
N OT FOR U SE W ITH
TALKBAC K SPEAKER S
AU D IO
IN L.
AU D IO
IN R .
AU D IO
OU T
-24VD C
R
T
POW ER
SU PPLY
PAGE
C ON TR OL
GN D
T
R
3
947006
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