VRX932LA
User’s Guide
Part Number: 353551-001
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INTRODUCTION TO THE VRX932LA
The VRX932LA is a two-way, line-array loudspeaker system intended for use in arrays of up to six enclosures.
Three high-frequency drivers are mounted to the Constant Curvature waveguide which is designed so that multi-
ple enclosures may be arrayed with no discontinuity in the vertical coverage pattern. As a result, the array will
behave in much the same way as would a single loudspeaker. Array coverage may be adjusted by means of the
Array Configuration Selector (ACS), a feature that provides amplitude shading (see page 6) when the system is
used in passive mode. Integral rigging hardware, a dual angle pole socket and an accessory array frame provide
for a variety of mounting and suspension options.
Dimensional Drawings
343 mm
13.5 in
15º
1325 mm
52.2 in
376 mm
14.8 in
597 mm
23.5 in
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SPECIFICATIONS
VRX932LA - 12¨, two-way, line-array loudspeaker system
System Type:
12" two-way, line array loudspeaker system
Frequency Range (-10 dB):
Frequency Response (±3 dB):
Coverage Pattern:
57 Hz - 20 kHz
75 Hz - 20 kHz
100º x 15º nominal (horizontal x vertical)
Crossover Modes:
Bi-amp / passive, externally switchable
Crossover Frequency:
Power Rating
1.2 kHz
Passive: 800 W / 1600 W / 3200 W
(Continuous¹/ Program/ Peak):
Bi-amp LF: 800 W / 1600 W / 3200 W
Bi-amp HF: 75 W / 150 W / 300 W
System Maximum SPL²:
130 dB SPL peak (passive)
LF: 130 dB
HF: 139 dB
System Sensitivity (1w @ 1m):
95 dB SPL (passive mode)
LF: 95 dB
HF: 114 dB³
LF Driver:
HF Driver:
Nominal Impedance:
1 x JBL 2262H 305 mm (12 in) Differential Drive® woofer with neodymium-magnet and dual voice-coils
3 x JBL 2407J, 25.4 mm (1 in) voice-coil, neodymium magnet compression driver
Passive: 8 ohm
Bi-amp LF: 8 ohms
Bi-amp HF: 8 ohms
Active Tunings:
Enclosure:
Tunings available at www.jblpro.com
18 mm, 11-ply birch plywood.
Suspension / Mounting:
Finish:
Suspension requires optional VRX932LA-AF line-array frame kit / Dual angle 35 mm pole socket
Black DuraFlex™ finish
Grille:
Powder coated, black, 16-gauge perforated steel with acoustically transparent foam
Neutrik ® Speakon® NL-4 (x2)
349 mm x 597 mm x 381 mm (13.75 in x 23.5 in x 15.0 in)
21.8 kg (48 lb)
Input Connectors:
Dimensions (H x W x D):
Net Weight:
Optional Accessories:
VRX932LA-AF: Suspension array frame
SS2-BK: Tripod speaker stand
SS3-BK: Satellite speaker pole, 41 in (1041 mm)
SS4-BK: Adjustable satellite speaker pole to be used with the SRX718S only.
¹ IEC filtered noise with 6 dB creat factor, 2 hrs / ² “Frequency Range” and “Frequency Response” are based on half-space conditions
sensitivity is based on a measurements averaged between 1.5KHz - 16KHz
/
³ HF driver
Functional Block Diagram
LONG THROW
-
+3 dB
+
+
0 dB
-
-
MID THROW
+
HPF
+
-
1+
1-
-
1+
1-
NL4
INPUT
+
-3 dB
NL4
INPUT
2+
2-
+
SHORT THROW
-
2+
2-
PASSIVE
MODE
BI-AMP
MODE
+
-
1+
1-
LPF
+
-
1+
1-
NL4
INPUT
NL4
INPUT
2+
2-
2+
2-
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AMPLITUDE SHADING
Amplitude Shading
Amplitude shading is a technique that allows the coverage pattern of a loudspeaker array to be shaped by
adjusting the relative acoustic output of some of the devices in the array. Most often, array shading involves only
the mid and high-frequency sections of the array. In a simple system consisting of three VRX932LAs, the lower
speaker (which covers the nearest listeners) may have its high-frequency output reduced. At the same time, the
upper speaker may have its high frequency output increased. The overall sound-power in the room is unchanged
but the distribution of acoustic energy to the audience is far more uniform. Amplitude shading of a VRX932LA
array may be accomplished in passive or bi-amplified systems.
Array Configuration Selector (ACS)
In passive mode, the Array Configuration Selector may be used. The -3 dB position will typically be used for the
speaker(s) in an array that are covering the nearest listening area. The +3 dB position will be used for the speak-
er(s) covering the more distant areas; or to compensate for the low-frequency build-up resulting from mutual cou-
pling of multiple woofers in an array.
Long Throw (+3 dB)
Short Throw (-3 dB)
Medium Throw (0 dB)
Frequency Response
The frequency repsonse graph represents measurements from a single VRX932LA speaker, applying the three
different ACS settings: +3dB, 0dB, -3dB.
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Array Configuration Selector (ACS)
Below is an example of applying the ACS in a three-speaker array. In this particular configuration, the ACS on
the top speaker is set at +3 dB, the middle speaker at 0 dB, and the bottom speaker -3 dB.
+3 dB
0 dB
-3 dB
Audience
Bi-Amplified System
In a bi-amplified system, array shading is accomplished by connecting separate amplifier channels to the HF
section of each VRX932LA. In larger arrays, a single amplifier channel may be used for two adjacent loudspeak-
ers. Array shading is then accomplished by adjusting the gain of the HF amplifier channels. For extremely pre-
cise control over system performance, it may also be desirable to dedicate an individual system controller output
to each HF amplifier channel.
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SYSTEM PROCESSOR TUNINGS
The following table represents the JBL-approved tuning for the BSS366. If you have a processor for which
VRX932LA settings have not been created, the table may be used as a starting point to set your processor.
Keep in mind that various processors respond to settings in different ways, so some additional fine-tuning may
be required. For updated tunings, or if you own a dbx DriveRack™ or BSS processor that does not include
VRX932LA tunings, these may be downloaded from http://www.jblpro.com/pages/tunings/tunings_main.htm.
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DEPLOYING THE SYSTEM
The VRX932LA is a flexible speaker system that can be deployed in ground-supported or suspended applica-
tions. The following information will help you set up your VRX932LA system safely and effectively.
POLE AND TRIPOD SAFETY WARNINGS!
When using stands or poles, be sure to observe the following precautions:
• Check the stand or pole specification to be certain the device is designed to support the weight of the
speaker. Observe all safety precautions specified by the manufacturer.
• Be certain that the surface on which the system is to be stacked is flat, stable and solid.
• Route cables so that performers, production crew, and audience will not trip and topple the speakers.
• Inspect the stand (or pole and associated hardware) before each use and do not use equipment with
worn, damaged, or missing parts.
• Do not attempt to place more than two VRX932LA loudspeakers on a stand or pole.
• When mounting two VRX932LA speakers on a pole or tripod, integral rigging hardware must be used to
secure the speakers to each other.
• Always be cautious when deploying the system outdoors. Unexpected winds may topple a system. It may
be necessary to place additional weight (i.e. sandbags) on the base of the stand to improve stability. Avoid
attaching banners or similar items to any part of a speaker system. Such attachments could act as a sail
and topple the system.
• Unless you are confident that you can handle the weight of the speaker, ask another person to help you
get it onto the tripod stand or pole.
• One or two VRX932LA loudspeakers may be mounted onto either a JBL SS2-BK tripod stand or a JBL
SRX718S subwoofer with an SS4-BK adjustable pole. Do not stack more than two VRX932LA speakers
on a pole. When pole mounting on the SS4-BK, the pole is not to be extended beyond 1448 mm (57 in).
Single VRX932LA
A single VRX932LA may be used on a tripod stand (JBL SS2BK) or on a pole
over a subwoofer (JBL SS4BK and SRX718S). The use of a subwoofer is recom-
mended for applications requiring more low-frequency power and extension.
Usually, the Array Configuration Selector (ACS) switches on the input panel
should be set to the "Short Throw (-3 dB)" position when a single speaker is
used.
The VRX932LA includes a dual angle pole mount socket. By selecting the appro-
priate pole socket and adjusting the height of the tripod or pole, optimum cover-
age may be achieved. Ideally, the audience should not be able to see either the
bottom or the top surfaces of the speaker. This will insure that all listeners are
within the "included coverage angle" of the loudspeaker. The rear pole-socket will
position the speaker with the baffle 2.5º to the floor while the forward socket will
position the speaker with the baffle angled down by 15°. System illustration
shows available JBL SS2BK tripod stand.
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Dual VRX932LA
Unlike most conventional speakers, the VRX932LA is designed so that a pair of speak-
ers may be safely mounted onto a pole or tripod stand. For most applications, the for-
ward socket of the dual angle pole socket will be used. This will tilt the lower of the two
speakers at a 15° down-angle (providing coverage of the near listeners) while the upper
speaker will face straight out (covering the more distant areas). Ideally, the listeners
should not be able to see either the bottom or the top surfaces of the two-speaker array.
Usually, the Array Configuration Selector (ACS) switches on the lower speaker's input
panel should be set to the "Short Throw (-3 dB)" position while the upper speaker will be
set to either "Short Throw (-3 dB)" or "Mid Throw (0 dB)".
Place the speakers on the pole or tripod one at a time. Be sure to lock the two speakers
together using the integral rigging hardware (see below). System illustration shows avail-
able JBL SS4BK speaker pole and SRX718S subwoofers. Do not stack more than two
VRX932LA speakers on a pole.
Locking (2) VRX932LA Loudspeakers Together
Any time two or more VRX932LAs are arrayed together, they must be mechanically secured to each other using
the integral rigging frame and supplied quick release pins. See the diagram below for details. WARNING: Only
the correct quick release pins supplied by JBL are to be used
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SUSPENSION SAFETY WARNINGS!
Correct use of all rigging hardware is required for secure system suspension. Careful calculations should always
be performed to ensure that all components are used within their working load limits before the array is suspend-
ed. Never exceed the maximum recommended load ratings. Prior to suspending the system, an expert, trained
and experienced in flying speaker systems should be consulted.
Inspection & Maintenance
Before suspending or pole mounting any speaker system always inspect all components (enclosure, rigging
frames, pins, eyebolts, track fittings, etc.) for cracks, deformations, corrosion, missing, loose or damaged parts
that could reduce strength and safety of the array. Do not suspend or pole mount the speaker until the proper
corrective action has been taken. Installed systems should be inspected at least annually. The inspection shall
include a visual survey of all corners and load bearing surfaces for signs of cracking, water damage, de-lamina-
tion, or any other condition that may decrease the strength of the loudspeaker enclosure. Accessory rigging
hardware provided with or for the JBL VRX932LA loudspeaker must be inspected for fatigue at least annually or
as required by local ordinance. For all other hardware and fittings, refer to the hardware manufacturer's inspec-
tion and maintenance guidelines for process.
Are You New to Rigging?
If you are new to rigging, you should do the following:
•
Read and study JBL Technical Note Volume 1, Number 14: Basic Principles for Suspending
Loudspeaker Systems (available at http://www.jblpro.com/pub/technote/tn_v1n14.pdf).
Know the rules for safe rigging.
Attend a safe rigging seminar, such as that presented by professionals like Rigging Seminars™
(manufacturers of the C/M Lodestar).
Meet and establish a relationship with a licensed mechanical or structural engineer. Get in the habit of
asking them questions instead of guessing about their answers. Learn from what they tell you.
Meet and discuss this aspect of your business with your Insurance Agent.
Research and understand the codes, practices, and requirements in the venues where you intend to
operate your sound system.
•
•
•
•
•
Attachment to Structures
A licensed Professional Engineer must approve the placement and method of attachment to the structure prior to
the installation of any overhead object. The following performance standards should be provided to the
Professional Engineer for design purposes; Uniform Building Code as applicable, Municipal Building Code as
applicable, and Seismic Code as applicable. The installation of the hardware and method of attachment must be
carried out in the manner specified by the Professional Engineer. Improper installation may result in damage,
injury or death.
JBL is not responsible for the application of its products for any purpose or the misuse of this information for any
purpose. Furthermore, JBL is not responsible for the abuse of its products caused by avoiding compliance with
inspection and maintenance procedures or any other abuse.
VRX932LA-AF Array Frame
The VRX932LA-AF is an array frame kit designed to be used for suspension of the VRX932LA line array loud-
speaker. The optional array frame kit includes an array frame, quick release pins, a pair of forged 3/8” shackles,
and a set of drop levers.
Working Load Limit
The VRX932LA-AF is designed for suspension of no more
than six (6) VRX932LA speakers. The WLL (Working Load
Limit) for the VRX932LA-AF array frame is 136 kg (300 lb)
at a 10:1 Design Factor. The WLL is calculated as follows:
Nominal Material Yield Strength
WLL (Rated Capacity) =
Design Factor
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Installing the Array Frame
Suspension of the VRX932LA requires the VRX932LA-AF Array Frame [Warning: Do not use any substitute
for VRX932LA-AF Array Frame]. This device is attached to the VRX932LA's integral rigging using the provided
Quick Release Pins [Warning: Do not use any substitute for these pins]. Up to six (6) VRX932LA speakers
may be suspended from a single array frame.
1. Begin by attaching the two side arms (A) to either side of the center frame. Use a pair of the provided
Quick Release Pins (B) to attach the arms to the frame. Note: Side arms should be attached with the
rubber bumper facing up and away from the center frame. The center frame is installed with the rubber
gasket toward the enclosure and the label right side up.
2. Place the entire array frame on top of the VRX932LA and flip up the drop levers (C) found on both sides of
the speaker to be received by the array frame arms.
3. Once the drop levers on the speaker are received by the array frame, use a pair of the provided Quick
Release Pins (D) to attach the drop levers to the array frame.
(D)
(A)
(C)
(B)
(B)
(A)
Adding a Second Array Frame for Pullback
For some applications, it may be necessary to pull back the array from the bottom in order to achieve the
desired coverage. Every VRX932-AF is supplied with a spare set of Quick Release Pins pins and a pair of spare
drop levers that are used to adapt a second array frame to the bottom of a VRX932LA array. Once these are
installed on the bottom enclosure, the array frame may be attached as previously described.
Ground-Stacked, Upward Firing Arrays
Applications such as covering stadium bleachers from the playing field may be
addressed by installing the VRX932-AF array frame to the bottom of the array as
described in “Adding a Second Array Frame for Pullback.”
Up to four VRX932LA loudspeakers may be locked together and ground stacked
using the VRX932LA-AF array frame kit, as shown. [Warning: Do not ground
stack more than four VRX932LA loudpseakers in one array]. When ground
stacking VRX932LA loudspeakers, use the VRX932LA-AF array frame as the
base (as shown) by attaching the loose drop levers, included in the array frame
kit, to the lower rigging bar on the VRX932LA loudspeaker. When stacking the
loudspeakers together, make sure each loudspeaker is locked together. Be cer-
tain that the surface on which the system is to be stacked is flat, stable and solid.
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JBL WARRANTY AND CONTACTS
Who Is Protected by This Warranty?
Your JBL Warranty protects the original owner and all subsequent owners so long as: A.) Your JBL product has
been purchased in the Continental United States, Hawaii or Alaska. (This Warranty does not apply to JBL prod-
ucts purchased elsewhere except for purchases by military outlets. Other purchasers should contact the local
JBL distributor for warranty information.); and B.) The original dated bill of sale is presented whenever warranty
service is required.
What does the JBL Warranty cover?
Except as specified below, your JBL Warranty covers all defects in material and workmanship. The following are
not covered: Damage caused by accident, misuse, abuse, product modification or neglect; damage occurring
during shipment; damage resulting from failure to follow instructions contained in your Instruction Manual; dam-
age resulting from the performance of repairs by someone not authorized by JBL; claims based upon any mis-
representations by the seller; any JBL product on which the serial number has been defaced, modified or
removed.
Who Pays for What?
JBL will pay all labor and material expenses for all repairs covered by this warranty. Please be sure to save the
original shipping cartons because a charge will be made if replacement cartons are requested. Payment of ship-
ping charges is discussed in the next section of this warranty.
How to Obtain Warranty Performance
If your JBL product ever needs service, write or telephone us at JBL Incorporated (Attn: Customer Service
Department), 8500 Balboa Boulevard, PO. Box 2200, Northridge, California 91329 (818/893-8411). We may
direct you to an authorized JBL Service Agency or ask you to send your unit to the factory for repair. Either way,
you'll need to present the original bill of sale to establish the date of purchase. Please do not ship your JBL prod-
uct to the factory without prior authorization. If transportation of your JBL product presents any unusual difficul-
ties, please advise us and we may make special arrangements with you. Otherwise, you are responsible for
transporting your product for repair or arranging for its transportation and for payment of any initial shipping
charges. However, we will pay the return shipping charges if repairs are covered by the warranty.
Mailing Address:
Outside the USA:
JBL Professional
8500 Balboa Blvd.
Northridge, CA 91329 USA
Contact the JBL Professional Distributor in your area. A
complete list of JBL Professional international distributors is
Shipping Address:
Product Registration:
JBL Professional
8370 Balboa Blvd., Dock D
Northridge, CA 91329 USA
(Do not return product to this address without
first obtaining prior authorization from JBL)
Customer Service:
Monday through Friday
8:00am - 5:00pm
Pacific Standard Time In the U.S.A.
(800) 8JBLPRO (800.852.5776)
On the World Wide Web:
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