SR431QXLR
DOD SR431QXLR, SR830ZXLR, SR 231QX, SR831QXLR, SR430QXLR User Manual
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SR Series Equalizers
Owner’s Manual
• SR 231QX
• SR 430QX
• SR 431QX
• SR 830QX
• SR 831QX
A Harman International Company
These symbols are internationally accepted symbols that warn of potential
hazards with electrical products.The lightning flash means that there are
dangerous voltages present within the unit.The exclamation point indicates
that it is necessary for the user to refer to the owners manual.
These symbols warn that there are no user serviceable parts inside the unit.
Do not open the unit. Do not attempt to service the unit yourself.Refer all
servicing to qualified personnel. Opening the chassis for any reason will void
the manufacturer’s warranty. Do not get the unit wet. If liquid is spilled on
the unit, shut it off immediately and take it to a dealer for service.
Disconnect the unit during storms to prevent damage.
U.K. Mains Plug Warning
A molded mains plug that has been cut off from the cord is unsafe.
Discard the mains plug at a suitable facility.Never under any circum-
stances should you insert a damaged or cut mains plug into a 13
amp power socket.Do not use the mains plug without the fuse cover
in place. Replacement fuse covers can be obtained from your local retailer.Replacement fuses are 13 amps and MUST be ASTA approved to
BS1362.
Safety Instructions
Notice for customers if your unit is equipped with a power cord.
Warning:This appliance must be earthed.
The cores in the mains lead are colored in accordance with the following
code:
Green and Yellow - Earth Blue - Neutral Brown - Live
As colors of the cores in the mains lead of this appliance may not correspond with the colored markings identifying the terminals in your plug, proceed as follows:
•The core which is colored green and yellow must be connected to the
terminal in the plug marked with the letter E, or with the earth symbol, or colored green, or green and yellow.
•The core which is colored blue must be connected to the terminal
marked N, or colored black.
•The core which is colored brown must be connected to the terminal
marked L, or colored red.
This equipment may require the use of a different line cord,attachment
plug, or both,depending on the available power source at installation. If the
attachment plug needs to be changed, refer servicing to qualified service
personnel who should refer to the table below.The green/yellow wire shall
be connected directly to the unit’s chassis.
Warning: If the ground plug is defeated,certain fault conditions in the unit
or in the system to which it is connected can result in full line voltage
between chassis and earth ground. Severe injury or death can then result if
the chassis and earth ground are touched simultaneously.
LIVE
E
NEUTRAL
EARTH GND
CONDUCTOR
L
N
BROWN
BLUE
GREEN/YEL
BLACK
Normal Alt
WIRE COLOR
WHITE
GREEN
Warning
For your protection, please read the following:
Water and Moisture:Appliances should not be used near water
(e.g. near a bathtub,washbowl, kitchen sink, laundry tub,in a wet
basement, or near a swimming pool,etc.) Care should be taken so
that objects do not fall and liquids are not spilled into the enclosure
through openings.
Power Sources: The appliance should be connected to a power
supply only of the type described in the operating instructions or as
marked on the appliance.
Grounding or Polarization: Precautions should be taken so that
the grounding or polarization means of an appliance is not defeated.
Power Cord Protection: Power supply cords should be routed so
that they are not likely to be walked on or pinched by items placed
upon or against them, paying particular attention to cords at plugs,
convenience receptacles, and the point where they exit from the
appliance.
Servicing: To reduce the risk of fire or electrical shock, the user
should not attempt to service the appliance beyond that described in
the operating instructions.All other servicing should be referred to
qualified service personnel.
For units equipped with externally accessible fuse receptacle: Replace fuse with same type and rating only.
Electromagnetic Compatibility
Operation is subject to the following conditions:
•This device may not cause harmful interference.
•This device must accept any interference received,including
interference that may cause undesired operation.
•Use only shielded interconnecting cables.
•Operation of this unit within significant electromagnetic fields
should be avoided.
1
SR Series EQ’s
The symbols shown above are internationally accepted symbols that warn of
potential hazards with electrical products. The lightning flash with arrowpoint
in an equilateral triangle means that there are dangerous voltages present within the unit. The exclamation point in an equilateral triangle indicates that it is
necessary for the user to refer to the owner’s manual.
These symbols warn that there are no user serviceable parts inside the unit.
Do not open the unit. Do not attempt to service the unit yourself. Refer all
servicing to qualified personnel. Opening the chassis for any reason will void
the manufacturer’s warranty. Do not get the unit wet. If liquid is spilled on the
unit, shut it off immediately and take it to a dealer for service. Disconnect the
unit during storms to prevent damage.
U.K. MAINS PLUG WARNING
A molded mains plug that has been cut off from the cord is unsafe. Discard
the mains plug at a suitable disposal facility. NEVER UNDER ANY CIRCUMSTANCES SHOULD YOU INSERT A DAMAGED OR CUT MAINS PLUG
INTO A 13 AMP POWER SOCKET. Do not use the mains plug without the
fuse cover in place. Replacement fuse covers can be obtained from your local
retailer. Replacement fuses are 13 amps and MUST be ASTA approved to
BS1362.
Safety Instructions (European)
Notice For Customers If Your Unit Is Equipped With A Power Cord.
WARNING:THIS APPLIANCE MUST BE EARTHED.
The cores in the mains lead are colored in accordance with the following
code:
GREEN and YELLOW - Earth BLUE - Neutral BROWN - Live
As colors of the cores in the mains lead of this appliance may not correspond
with the colored markings identifying the terminals in your plug, proceed as
follows:
• The core which is colored green and yellow must be connected to the
terminal in the plug marked with the letter E, or with the earth symbol,
or colored green, or green and yellow.
2
SR Series EQ’s
• The core which is colored blue must be connected to the terminal
marked N or colored black.
• The core which is colored brown must be connected to the terminal
marked L or colored red.
These units comply with the European “EMC Directive” for emissions and susceptibility.
The power cord is terminated in a CEE7/7 plug (Continental Europe). The
green/yellow wire is connected directly to the unit's chassis. If you need to
change the plug, and if you are qualified to do so,refer to the table below.
WARNING:If the ground is defeated, certain fault conditions in the unit or in
the system to which it is connected can result in full line voltage between
chassis and earth ground. Severe injury or death can then result if the chassis
and earth ground are touched simultaneously.
IMPORTANT! FOR YOUR PROTECTION, PLEASE READ
THE FOLLOWING:
Water and Moisture:Appliance should not be used near water (e.g. near a
bathtub, washbowl, kitchen sink, laundry tub, in a wet basement, or near a
swimming pool, etc). Care should be taken so that objects do not fall and liquids are not spilled into the enclosure through openings.
POWER SOURCES:The appliance should be connected to a power supply only
of the type described in the operating instructions or as marked on the appliance.
GROUNDING OR POLARIZATION: Precautions should be taken so that the
grounding or polarization means of an appliance is not defeated.
POWER CORD PROTECTION: Power supply cords should be routed so that
they are not likely to be walked on or pinched by items placed upon or against
them, paying particular attention to cords at plugs, convenience receptacles,
and the point where they exit from the appliance.
SERVICING:The user should not attempt to service the appliance beyond that
described in the operating instructions. All other servicing should be referred
to qualified service personnel.
LIVE
E
NEUTRAL
EARTH GND
CONDUCTOR
L
N
BROWN
BLUE
GREEN/YEL
BLACK
Normal Alt
WIRE COLOR
WHITE
GREEN
3
SR Series EQ’s
INTRODUCTION
Congratulations, and thank you for your purchase of DOD equalization components. DOD equalizers are versatile, cost-effective equalization tools for the
musician, performer,studio engineer, and sound contractor.Each equalizer allows
the user to see a graphic representation of the equalization applied to the audio
spectrum, and offers the flexibility to provide solutions to many EQ problems.
The units offer up to 12 dB of cut or boost per band with a switchable low cut
filter for each channel. Electronic switching of these functions minimizes switching transients (loud pops or clicks when the switch is depressed), and up to ±12
dB of level control is available to compensate for gain changes due to equalization.This feature makes A/B comparisons of the equalized signal to the original
signal quick and easy. Connection to the equalizer may be either balanced with
an XLR connector or with optional unbalanced 1/4" phone plug making the
units readily interfaceable to any system. Dual channel units may be used as a
stereo equalizer or as two independent equalizers. The units offer either 1/3rd
octave or 2/3rds octave resolution, depending on the unit chosen. All DOD
equalizers are solidly built with steel chassis and CSA standard circuit boards for
years of reliable service.
WHY A 1/3RD OCTAVE OR A 2/3RD OCTAVE EQUALIZER?
Most graphic equalizers divide up the audio frequency range into 1/3rd octave
or 2/3rds octave pieces. One octave covers a 2-to-1 range of frequencies. For
example, the frequency range form 50 to 100 Hertz is one octave. The audio
frequency range covers 10 octaves from 20 Hz to 20 kilo (thousand) Hz. If each
of the ten octaves is divided into thirds,you get 30 pieces, or bands,of frequency. (The 31 bands on DOD equalizers result from including both 20 Hz and 20
kHz bands on the ends of the audio frequency range). A 1/3 octave equalizer
means that 3 bands span 1 octave, while a 2/3 octave equalizer means that 3
bands span 2 octaves. Therefore, one band on a 2/3 octave equalizer is twice as
wide as one band on a 1/3 octave equalizer. So, boosting or cutting any band will
affect a wider range of frequencies on the 2/3 octave equalizer.
A 1/3rd octave equalizer is the most precise because you're working with a narrower frequency range per band or slider on the equalizer. To cover the entire
audio range, you need 31 bands or sliders, which normally take up the entire
width of a rack panel, and take some time to adjust properly. A high-resolution
real time audio spectrum analyzer (such as DOD's SR Series RTA ) is a very useful tool when setting up a 1/3rd octave graphic equalizer to compensate for poor
room acoustics, poor speaker response, or the deficiencies of an audio system.
While the 2/3rds octave is not as precise as a 1/3rd, it takes far less time to
equalize a signal with this unit, and allows more channels of EQ to be reached.
The 2/3rds octave EQ allows you to quickly and easily modify a sound for use in
music, recording, or sound reinforcement.
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