Valcom V-9975 User manual

VSP-V-9975
Issue 4
1947006
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)
•High impedance output
•Line output
Nominal Specifications
•Type of Inputs:
Hi impedance 10K Ohms (unbalanced)
Stereo HiZ 10K Ohms (unbalanced)
•Type of Outputs: Line (balanced)
Hi impedance 10K Ohms (unbalanced)
•Frequency Response: 35Hz-20kHz +1dB
•Distortion: < 0.3%
•Frequency Centers: 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
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)
Environment
•Temperature: 0 to 50 Degrees C
•Humidity: 0-85% non-precipitating
OPERATION
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.
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.
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.

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Mounting
The V-9975 is designed for wall mounting. To
mount the unit, install (2) #8 sheet metal screws
provided into the wall 6-1/4 inch apart. Screw heads
should protrude from wall no more than 1/16 inch.
Hang unit on screws. With security cover open,
install (1) #8 sheet metal screw in slot located at
bottom of unit and tighten, to complete the mounting.
TECHNICAL ASSISTANCE
When trouble is reported, verify that DC power is
being supplied to the unit and there are no shorts or
grounds on cabling. Assistance in troubleshooting is
available from the factory. When calling, you should
have a VOM and a telephone test set available and be
calling from the job site. Call [phone] and
ask for Technical Support, or call [phone] for
Valcom 24-hour Automated Support or visit our
website at http://www.valcom.com.
Valcom equipment is not field repairable. Valcom,
Inc. maintains service facilities in Roanoke, VA.
Should repairs be necessary, attach a tag to the unit
clearly stating company name, address, phone
number, contact person, and the nature of the
problem. Send the unit to:
Repair and Return Dept.
Valcom, Inc.
5614 Hollins Road
Roanoke, VA 24019-5056
VALCOM LIMITED WARRANTY
Valcom, Inc. warrants its products to be free from defects in materials and workmanship under conditions of normal use and service
for a period of one year from the date of shipment. The obligation under this warranty shall be limited to the replacement, repair or
refund of any such defective device within the warranty period, provided that:
1. inspection by Valcom, Inc. indicates the validity of the claim,
2. the defect is not the result of damage, misuse, or negligence after the original shipment.
3. the product has not been altered in any way or repaired by others and that factory sealed units are unopened (A service
charge plus parts and labor will be applied to units defaced or physically damaged),
4. freight charges for the return of products to Valcom are prepaid,
5. all units ‘out of warranty’ are subject to a service charge. The service charge will cover minor repairs (Major repairs will
be subject to additional charges for parts and labor).
This warranty is in lieu of and excludes all other warranties, expressed or implied, and in no event shall Valcom, Inc. be
liable for any anticipated profits, consequential damages, loss of time or other losses incurred by the buyer in connection
with the purchase, operation, or use of the product.
This warranty specifically excludes damage incurred in shipment. In the event a product is received in damaged condition, the
carrier should be notified immediately. Claims for such damage should be filed with the carrier involved in accordance with the
F.O.B. point.
Headquarters: In Canada
Valcom, Inc. CMX Corporation
1111 Industry Avenue 35 Van Kirk Drive #11 and 12
Roanoke, VA 24013 Brampton, Ontario L7A1A5
Phone: [phone] Phone: [phone]
FAX: [phone] FAX: [phone]

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POWER
SUPPLY
GND
AUDIO
IN L. AUDIO IN R. AUDIO OUT
AUDIO INPUT GND GND
AUDIO OUTPUT
LINE OUT
GND -24VDC
GND
POWER
IN OUT
EQ
NOT FOR USE WITH
TALKBACK SPEAKERS
+12 dB
+6 dB
0 dB
-6 dB
-12 dB
60 Hz 200 Hz 560 Hz 1100 Hz 2200 Hz 4500 Hz 10 kHz
60 Hz 200 Hz 560 Hz 1100 Hz 2200 Hz 4500 Hz 10 kHz
LEFT RIGHT
OUTPUT
MUSIC SOURCE
-24VDC
TO BACKGROUND
MUSIC INPUT
POWER
SUPPLY
GND
AUDIO
IN L. AUDIO IN R. AUDIO OUT
AUDIO INPUT GND GND
AUDIO OUTPUT
LINE OUT
GND -24VDC
GND
POWER
IN OUT
EQ
NOT FOR USE WITH
TALKBACK SPEAKERS
+12 dB
+6 dB
0 dB
-6 dB
-12 dB
60 Hz 200 Hz 560 Hz 1100 Hz 2200 Hz 4500 Hz 10 kHz
60 Hz 200 Hz 560 Hz 1100 Hz 2200 Hz 4500 Hz 10 kHz
-24VDC
PAGE
CONTROL T
R
TR
FIGURE 1 - CONNECTIONS
FIGURE 2 - CONNECTIONS