JBL SR47-X User manual

JBL SR-X User’s Guide
Contents
Welcome . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Before You Begin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Rigging/Suspending SR-X Products
Stand Mounting
Stacking Speakers
Hearing Damage
Outdoor Applications
Product Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Recommended Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Cables & Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Passive Systems
Bi-Amp Systems
Wire Gauges
Input Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Crossovers & Controllers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
System Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Specifications & Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Part # 981-00052-02
rev. E
05/00

Welcome
2
Welcome to the family of discerning sound equipment users who have selected JBL Professional loudspeakers.
This User’s Guide contains important information that will help you get the most from your JBL speakers so
please take a few moments to read it and be sure to keep it in a safe place for future reference.
Thanks from all of us at JBL Professional.
Model: SR47 -X Serial Number:
Purchased from (dealer):
Purchase date:
JBL Professional Contact Information
A Harman International Company
JBL Professional
8500 Balboa Blvd.
Northridge, CA 91329
www.jblpro.com

Before You Begin
3
Important information
Before using your SR-X Series speaker system, please review the following for important information on
safety and protection of your investment in quality loudspeakers.
Rigging / suspending SR-X products
SR-X Series speakers are designed for portable applications in which the speakers will be stacked directly
on the floor, stage, speaker stands (SR4702X, SR4722X only), other speakers, or a solid, stable platform.
SR-X Series speakers have no provisions for hanging, rigging or suspension.
SR-X/F Series speakers are similar to SR-X and in addition have provisions for flying. SR-X/F versions
should always be substituted for SR-X if flying or suspending the speaker system is required.
ONLY SPEAKERS SPECIFICALLY DESIGNED FOR FLYING / RIGGING SHOULD BE SUSPENDED.
For further information on suspending speakers contact JBL and request Technical Note Volume 1,
Number 14 – “Basic Principles for Suspending Loudspeaker Systems”.
Stand mounting
Some SR-X models (SR4702X, SR4722X) include a receptacle cup to facilitate mounting on tripod stands.
When using these stands, be sure to observe the following precautions:
• Check the stand specification to be certain it is designed to support the weight of the speaker. Observe
all safety precautions specified by the stand manufacturer.
• Always verify that the stand is placed on a flat, level, and stable surface.
• Route cables so that performers, crew, and audience will not trip over them and pull the speaker over.
• Be sure to fully extend the legs of tripod type stands.
• Position the stand so that the legs do not present a trip hazard.
• Do not attempt to place more than one speaker on a stand.
• Always be cautious in windy, outdoor conditions. It may be necessary to place additional weight
(i.e. sandbags) on the base of the stand to improve stability.
Stacking speakers
Safety precautions should be observed when stacking SR-X speakers.
• Verify that the floor or stage on which the speakers will be stacked is flat, level and solid.
• When used outdoors, be aware of winds that could tip a tall speaker stack over.
• Position the speakers to minimize the possibility that performers, crew, or audience will bump into them.
• Under extreme, high-SPL conditions it’s possible that speakers on a highly polished surface can “creep.”
(i.e. move due to the power of the acoustic energy) Precautions should be taken so that such creeping
will not result in toppling of the speaker stack.
Hearing damage, prolonged exposure to excessive SPL
SR-X series loudspeakers are easily capable of generating sound pressure levels (SPL) sufficient to cause
permanent hearing damage to performers, production crew and audience members. Proper precautions
should be taken to avoid prolonged exposure to SPL in excess of 85dB.
Exposure to moisture, outdoor applications
While SR-X Series loudspeakers will work great for outdoor sound reinforcement, they are not “weather-
proof” and are not intended for continuous exposure to extremes of humidity, temperature, salt air, or
UV rays. Exposure to outdoor environmental conditions may result in premature failure of components as
well as degradation to appearance.

Product Range
4
The SR-X Series consists of 11 popular configurations including subwoofers, front-of-house systems, and stage
monitors. SR-X models include these features:
• Metalized polyester capacitors are used throughout (instead of cheaper electrolytics) for higher power
handling and lower distortion.
• “Dual-mode” crossovers can be easily switched from full-range to bi-amplified operation. A tamper-resistant,
internal mode selector provides a visible, external indication of the selected mode.
• Dual driver subwoofers may be operated in parallel or discrete mode.
• VGC™ (Vented Gap Cooling) low-frequency transducers control heat build-up to increase power handling and
decrease power compression, providing more acoustic output for every watt of amplifier input.
• 13 ply birch enclosures are finished in tough DuraFlex™ that resists the inevitable scuffs and dings a hard-
working speaker suffers during a life of one-nighters.
• Pure titanium diaphragm compression drivers are used in all two & three-way models for high power handling
and reliability.
• Optimized Aperture™ horn/driver combinations reduce throat distortion and provide smooth frequency
response.
• A non-resonant, full-length perforated metal grill provides protection for the components and a rich yet
unobtrusive appearance.
• Trapezoidal enclosures (except SR4715X / 4718X / 4719X / 4702X) for optimal coverage when splaying multiple
cabinets.
• Family footprint on the most popular models provides ease of stacking for larger, full-range systems
Stage Monitor
SR4702X
12” two-way stage monitor: With 600 watts of power capacity and 95 dB
sensitivity, the SR4702X delivers all the output needed to cut through high
stage volumes. Its compact footprint won’t crowd the stage and the low
profile won’t come between the performer and the audience. For increased
flexibility, a tripod mount socket is provided to facilitate use as a front-of-
house speaker. A “pass-thru” speaker connector allows cleaner connection
of adjacent cabinets driven by the same amplifier.

5
Product Range
2-Way Systems
SR4722X
12” two-way compact speaker: A great choice for applications where compact size,
ease of transport, and speaker stand “mountability” are required. For speech and many
music uses, the SR4722X works great by itself. When more bass is needed, team it up
with an SR-X Series sub-woofer. A pole-mount socket (35 mm) is provided for stand
mounting.
SR4725X
15” two-way compact speaker: The 15” two-way system is
a favorite for general music and speech applications. The
SR4725X produces extended low frequencies in a trans-
portable enclosure.
SR4726X
15” two-way high-output speaker: When the requirement is for very high acoustic
output, extended low-frequency performance, and the convenience of a one-box
system, chose the SR4726X. The large format 2447 compression driver coupled to
an Optimized Aperture™ horn delivers great pattern control at very high levels with
low distortion.
Dual LF Systems
SR4731X
Dual 12” two-way system: With the combined
power of two VGC LF motors and the cone area of
dual 12” speakers, the SR4731X produces incredible
amounts of mid-range power combined with lots of
tight, punchy bass. The transition from the 12” LF
drivers to the large format 2447 compression driver
is very smooth. For extremely high-power applica-
tions requiring earth-moving bass, use the SR4731X
over the SR4719X subwoofer.
SR4733X
Dual 15” two-way system: The SR4733X delivers the power and performance of
separate subwoofer / high-mid configurations combined with the simplicity of an
all-in-one system. At home in a wide range of live sound and playback applica-
tions, the SR4733X delivers very high acoustic output combined with lots of
extended low bass.

Product Range
6
3-Way Systems
SR4732X
Dual 12” three-way system: Take the SR4731X, add the high-frequency sizzle of a
2404 UHF driver and you get the ultimate speaker system for very high-level music
playback in medium to short throw applications. In combination with the SR4719X
subwoofer, this is an unbeatable system for DJ and dance club applications.
SR4735X
15” three-way system: For long-throw
applications in which the power and additional
control of a horn-loaded cone MF driver is
desired, choose the SR4735X. This system
boasts extremely wide frequency response and
is a great choice as an arrayable, front-of-
house reinforcement system.
Subwoofers
SR4715X
Dual 15” subwoofer: For those who prefer the tight, punchy bass of a 15” sub, the
SR4715X is the answer. The SR4715X has the same footprint as the other SR-X 15”
two-way systems (including the dual LF models) for tight floor stacking.
SR4718X
Single 18” subwoofer: The single 2241 subwoofer pro-
duces pounding bass down to 30 Hz. A top mounted,
35 mm diameter socket is provided for an optional
pole (JBL model SS3-BK) to elevate a speaker such as
the SR4702X or SR4722X above your subwoofer. The
socket is intended to accommodate speakers up to
100 lbs (45 kg). Observe the stand mounting precau-
tions outlined in the “Before You Begin” section of
this User’s Guide.
SR4719X
Dual 18” subwoofer: Capable of delivering a wall-shaking 136 dB of acoustical
output with a frequency range extending to 25 Hz, the SR4719X is the choice for
large rooms, outdoor performance and high-level sound reinforcement or
music playback. The rectangular enclosure is ideal for stacking any of the SR-X
two-way systems for those who require uncompromising high level sound
reproduction.

Recommended Power
7
Model Full-Range / Parallel (1) HF (2) LF (3) / Discrete (4)
SR4702X 600W@8Ω100W@8Ω600W@8Ω
SR4715X 1,200W@4Ωn/a 600W@8Ωx2
SR4718X 600W@4Ωn/a n/a
SR4719X 1,200W@4Ωn/a 600W@8Ωx2
SR4722X 600W@8Ω60W@8Ω600W@8Ω
SR4725X 600W@8Ω100W@8Ω600W@8Ω
SR4726X 600W@8Ω150W@16Ω600W@8Ω
SR4731X 1,200W@4Ω150W@16Ω1,200W@4Ω
SR4732X 1,200W@4Ω150W@16Ω1,200W@4Ω
SR4733X 1,200W@4Ω150W@16Ω1,200W@4Ω
SR4735X 600W@8Ω100W@8Ω600W@8Ω
1. Full-range / Parallel – Is the amplifier power required to optimally drive this speaker system when used in
full-range (passive) mode. In the case of dual-driver subwoofer models, this is the power required to drive
both transducers at the same time.
2. HF – Is the amplifier power required to optimally drive the high-frequency section of this speaker system
when used in bi-amp mode.
3. LF – Is the amplifier power required to optimally drive the low-frequency section of this speaker system
when used in bi-amp mode.
4. Discrete – Is the amplifier power required to optimally drive an individual transducer in a dual
transducer subwoofer.
5. ± 1 or ± 2 Pass-Thru - This allows for the convenience of a single conductor cable from the amplifier rack to
the speakers stack, this configuration supplies separate amplifier power to the subwoofer (ie ± 2) and to the
mid-high speaker (ie. ± 1 Pass-Thru).
The following table shows the recommended amplifier power for SR-X models. For applications in which
the ability to reproduce brief, high-power transients is important, an amplifier capable of up to twice the
power listed below may be used.

Cable & Connections
Passive Systems & Subs (Parallel mode)
Bi-Amp Systems & Subs (Discrete mode)
2 Core
4 Core
± 2 HF Signal or
LF #2 Sub Signal
± 1 LF Signal or
LF #1 Sub Signal
± 1 Full Range Signal
or
Sub Signal
Each connector panel incorporates two Neutrik®Speakon®connectors. The second connector facilitates the
ability to “loop through” to other SR-X speakers in the system. The diagrams below detail the cable-side
connections.
NL4 MPR Connector
NL4 MPR Connector
8
Wire Gauges
Selection of the appropriate wire gauge is important to system operation. A cable that’s too light will result in
amplifier power being wasted due to the series resistance of the cable and in loss of low-frequency performance
due to degraded damping factor.
Wire Gauge Chart for 0.5 dB Loss
20
15
10
55
1.5 50
15 100 30 150 46 200 61 250 76 300 91
Length of Run (ft.) / (m)
Wire Size (AWG)
16 Ohm Load
8 Ohm Load
4 Ohm Load
.52
1.65
5.26
16.77
mm2

9
1. Remove 6 connector plate retaining screws
and remove the plate.
2. Turn plate over and locate the male connector.
3. Pull out connector and firmly place in socket of desired
system mode - you should be able to see the yellow
indicator in the desired mode window.
4. Replace plate and secure with 6 screws.
Please Note: For SRX4715X - SRX4719X, The connector is split
to permit discrete mode operation.
All SR-X models are fitted with the internal network mode selector.
The ability to select the mode of operation provides the sound system user flexibility in
the system configuration, and also permits the system to be upgraded at a later date. By
simply removing the input panel and changing the position of a heavy duty connector,
the system can be configured as either a bi-amp or a passive system. After replacing the
input panel, the network position is indicated on the connector plate panel. This pro-
vides a truly tamper resistant solution to avoid the horrors of a mis-configuration.
In passive operation, a system can be operated with a minimum of only one amplifier
and no additional system controllers. In bi-amp operation, the system can be operated
for maximum transducer performance and will require the use of additional amplifiers -
and an electronic crossover (see “Crossovers and Controllers”). For Subwoofer systems
with more than one transducer, the same ability to select the mode of operation is provided - but instead of
bi-amp/passive selection, the input can be configured for either parallel woofers (4 ohm) with ± 1 or ± 2
Pass-Thru or individual transducer access (2 x 8 ohm). This can be useful for assuring maximum power transfer
from the amplifier to the transducers. The SRX4718 also has a mode selector for ± 1 or ± 2.
Internal Network Mode Selector
Changing the Input Mode Connector
Connector
Please Note: There are no passive network components in the circuit when the Bi-amp mode is selected.
(Except: SR4732X and SR4735X which retain a crossover section between midrange and HF.)
SR-X Series
Input PanelInput Panel

Input Configurations
Sub Connector Plate w/ NL4 MPR Inputs
SR4715/19X Discrete Mode
2-Way Connector Plate w/ NL4 MPR Inputs
In
Out
LF #2
LF #1
In
Out
LF #2
LF #1
±2
±2
±1
±1
In
Out
LF #2
LF #1
±2
±2
±1
±1
In
Out
LF
±2
±2
±1
±1
In
Out
LF
±2
±2
±1
±1
Passive Mode Bi-Amp Mode
In
Out
In
Out
HF
LF
±2
±1
±2
±1
±2
±1
±2
±1
±2
±1
±2
±1
This section describes the different configurations of Input Connector Panel mode selections.
The wiring connections from the Input Panel to the transducers change when the mode selector is moved.
Please Note: Each line in the diagrams below represents a pair of wires. (E.g. both +1 and -1 connecting wires.)
10
Input Configurations
3-Way Systems
Passive Mode Bi-Amp Mode
In
Out
HF
LF
In
Out LF
±2
±1
±2
±1
±2
±1
±2
±1
MF
HF
MF
LPF
BPF
HPF
LPF
HPF
LPF = Low Pass Filter
BPF = Band Pass Filter
HPF = High Pass Filter
SR4718X Pin 1 Hot (as shipped) SR4718X Pin 2 Hot *
SR4715/19X Pin 1 Hot (as shipped) SRX4715/19X Pin 2 Hot *
LPF
HPF
* Units manufactured after April ‘00.
HF
LF

11
SR-X Series loudspeaker systems may be operated in an optional bi-amplified mode. When used in this
optional mode, an external, low-level crossover network is required. JBL Professional offers the DSC260 Digital
System Controller for these applications. In addition to the crossover functions, the DSC260 provides signal
(time/phase) alignment, equalization, and limiting. JBL has developed programs for the DSC260 that will
optimize the performance of your SR-X Series system. These programs may be downloaded from the “Software
Downloads” section of www.jblpro.com at no charge. If you do not have access to the World Wide Web, you
may contact JBL Professional at the address listed elsewhere in this manual. The documentation included with
your DSC260 will detail the process for loading new programs.
DSC260 Digital System Controller
Other Crossovers and Controllers
The crossover designs of SR-X series speakers incorporate circuitry that tailors system response. When the
internal SR-X crossovers are set to “Bi-amp Mode” this circuitry is bypassed. The JBL DSC260 programs for
SR-X include the appropriate response tailoring. Other crossovers and system controllers may not have this
tailoring and may require additional equalization in order to perform properly.
Crossovers & Controllers

System Configurations
12
Full-range 2-Way
Bi-Amplified 2-Way
There are many different possible configurations of systems within the JBL SR-X Series. This section shows a
selection of key system configurations that will provide a basis for setting up any system, it includes: DSC
controllers, amplifiers and wiring connections. It is very important that you are familiar with the previous
sections of this User’s Guide and also the DSC260 system controller. Settings are available for the DSC260 for
bi-amplified, and bi-amplified plus subwoofer, operation of the SR-X systems. Please note that when using
the LF reinforcement systems, a suitable adjustment may be required in the DSC260 for accurate operation in
the system. This is a straight forward procedure which is clearly outlined in the DSC260 User’s Guide.
Note: Each line in the diagrams below represents a pair of wires. (E.g. both +1 and -1 connecting wire.)
Amplifier
Full Range
±1
LF ± 1
Input B
Output 6
HF ± 2
Output 4
DSC260
See “Crossovers and Controllers” for important information.
Amplifier
Amplifier
12

HF ± 1
Full-Range
±1
Pin 2 mode
LF ± 2
13
System Configurations
Bi-Amp 2-way with Sub (Discrete Mode)
Sub ± 1
DSC260
Input B
Output 4
Output 2
Sub ± 2
Output 6
Full-range 2-way with Sub (Parallel Mode)
Full-range 2-Way with Sub (using a single 4 conductor amp - speaker cable)
(See page 9 and 10 for details on input configuration.)
Sub ± 1
DSC260
Input B
Full Range
±1
Output 4
Output 2
Amplifier
Amplifier
Amplifier
Amplifier
LF ± 1
HF ± 2
M552

SR-X/F Flying Versions
Suspension or flying speaker systems requires training and expertise. Improper rigging of a flying speaker
may result in injury, death, equipment damage, and legal liability. This User Guide is intended to provide a
skilled system rigger with resources needed to get the most from the SR-X/F speaker system. This User
Guide will not provide the novice with the skills and training needed to safely fly a speaker system. If you
lack the skills, training, and proper ancillary equipment to fly a speaker system do not attempt to do so.
Obtain the services of a qualified rigger or get the proper training yourself. One source for training is:
RiggerMeister
The SR-X/F models are equipped with ATM FLY-WARE®rigging hardware. Only hardware rated for overhead
suspension and certified in accordance with appropriate safety standards should be used to fly speaker sys-
tems. A source for such hardware and assistance in selecting appropriate hardware is:
Sound
Manufacturing
Inc.
In the U.S call or write:
[phone]
(888) RIG-MORE
Fax: [phone]
21000 South Wilmington Ave.
Carson, CA 90810
In Europe call or write:
(44) 0171-482-3300
Fax: [phone]
102 Grafton Road
London NW5 4BA UK
In the U.S call or write:
[phone]
(888) RIG-MORE
Fax: [phone]
21000 South Wilmington Ave.
Carson, CA 90810
In Europe call or write:
(44) 0171-482-3300
Fax: [phone]
102 Grafton Road
London NW5 4BA UK
www.atmflyware.com
In the U.S call or write:
[phone]
Fax: [phone]
PO Box 1907
Big Bear Lake, CA 92315-1907
www.smirigging.com
[email protected]
1414

Each primary “load bearing”suspension point shall be rated for the entire load.
Appropriate
Track Fitting
(User supplied, overhead
suspension rated and certified)
Secondary
Suspension Point
Appropriate Track Fitting
(EG: AF-DSF)
Primary “Load Bearing”
Facility Attachment Points
(MIN: 5:1 Design Factor or Local Standard, Whichever Is Greater)
Working load limits: No more than four (4) high (vertical)
The four (4) high vertical specification represents a static ratio of 7:1.
15
Example

LF Driver Mid Driver HF Driver Horn Rated System Frequency Crossover Nominal Dispersion Weight Shape Dimensions
Power* Impedance Range (-10 dB) Freq. Sensitivity** (H X V)
SR4702X 2206H -- 2426H OASR 600 8 42Hz-20kHz 1.3 kHz 95dB 85º x 85º 29 kg Multi-angle monitor 648 x 403 x 356
64 lbs 25.5 x 15.9 x 14
SR4715X 2226H (x2) -- -- -- 1200 4 35Hz-300Hz 80 - 100 Hz 100dB -- 53.5 kg Rectangular 1067 x 584 x 653
recommended 118 lbs 42 x 23 x 25.7
SR4718X 2241G -- -- -- 600 4 38Hz-300Hz 80 – 100 Hz 98dB -- 39.9 kg Rectangular 616 x 613 x 610 mm
recommended 88 lbs 24.3 x 24.1 x 24 in
SR4719X 2241H (x2) -- -- -- 1200 4 30Hz-300Hz 80 – 100 Hz 101dB -- 85.3 kg Rectangular 765 x 1219 x 616
recommended 188 lbs 30.1 x 48 x 24.3
SR4722X 2206H -- 2417H OASR 600 8 42Hz-18kHz 1.2 kHz 95dB 85º x 85º 27.2 kg Trapezoidal 686 x 486 x 333
SR4722X/F 60 lbs 27 x 19.1 x 13.1
SR4725X 2226H -- 2426H 2370A 600 8 35Hz-18kHz 1.1 kHz 98dB 90º X 40º 37.2 kg Trapezoidal 718 x 616 x 435
SR4725X/F 82 lbs 28.3 x 24.3 x 17.1
SR4726X 2226H -- 2447J 2381 600 8 35Hz-20kHz 1.1 kHz 97dB 90º X 50º 48.5 kg Trapezoidal 883 x 616 x 435
SR4726X/F 2383 60º X 50º 107 lbs 34.8 x 24.3 x 17.1
SR4731X 2206H (x2) -- 2447J 2381 1200 4 39Hz-20kHz 1.2 kHz 98dB 90º X 50º 59.9 kg Trapezoidal 1067 x 616 x 435
SR4731X/F 2383 60º X 50º 132 lbs 42 x 24.3 x 17.1
SR4732X 2206H (x2) 2447J 2404H 2381 1200 4 39Hz-21kHz 1.2 kHz, 98dB 90º X 50º 62.1 kg Trapezoidal 1067 x 616 x 435
SR4732X/F 6 kHz 137 lbs 42 x 24.3 x 17.1
SR4733X 2226H (x2) -- 2447J 2381 1200 4 37Hz-20kHz 1.2 kHz 100dB 90º X 50º 65.8 kg Trapezoidal 1219 x 616 x 435
SR4733X/F 2383 60º X 50º 145 lbs 48 x 24.3 x 17.1
SR4735X 2226H M209-8A 2426H MH1 600 8 36Hz-20kHz 340 Hz and 97dB 70º X 50º 50.8 kg Trapezoidal 946 x 616 x 479
SR4735X/F 1.6 kHz 112 lbs 37.3 x 24.3 x 18.9
* IEC filtered random noise with a 6 dB crest factor
**1W@1m (2.83V for 8ohms, 2.00V for 4ohms, ave'd 500Hz-5kHz)
Specifications subject to change without notice
Specs • Warranty
DuraFlex
Your SR-X loudspeaker system is finished in JBL’s DuraFlex™. DuraFlex is tough and inherently flexible and it is
extremely resistant to knocks, scratches and scuffs. The DuraFlex finish on your SR-X speakers is actually much
tougher than the plywood to which it is applied.
Note: SR-X enclosures are not paintable.
In the event that cosmetic damage occurs to your speakers a DuraFlex touch-up kit (PN 16677) is available
from JBL Professional.
Warranty & Contacting JBL
These products are designed and backed by JBL Professional, the world leader in sound reinforcement. For
complete JBL warranty information, to order replacement parts or to ask for clarifications to this manual,
contact JBL Professional:
Within the United States contact: Applications Dept
JBL Professional
PO Box 2200
8400 Balboa Blvd.
Northridge, CA 91329
In the USA you may call Monday through Friday, 8:00 am to 5:00 pm Pacific Coast Time:
[phone]
In other areas throughout the world: Contact the JBL Professional Distributor in your country.
A list of JBL Professional Distributors and U.S. Service Centers can be attained from the JBL Professional website:
www.jblpro.com