JBL Professional 981-00052-02 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 “weather­proof” 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

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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 hard­working 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-of­house speaker. A “pass-thru” speaker connector allows cleaner connection
of adjacent cabinets driven by the same amplifier.

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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 trans­portable 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 applica­tions 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.