JBL Vrx932la1 Manual

							SPECIFICATIONS
VRX915S - 15, BASS-REFLEX SUBWOOFER
System Type:15"bass reflex subwoofer
Frequency Range (-10 dB): 35Hz -250Hz
Frequency Response (±3 dB): 40Hz - 250Hz
Recommended Hi-Pass Filter: HP: Butterworth 24 dB/octave, 45 Hz LP: Linkwitz-Riley 48 dB/octave, 80 – 120Hz
Power Rating
1:
(Continuous  / Program / Peak) 800 W / 1600 W / 3200W
Recommended EQ: +2dB at 45Hz, Q: 2.5
Maximum SPL
2: 126 dB SPL
Sensitivity (1 W @ 1m) 91 dB SPL
LF Driver: 1 x JBL 2265G-1, 250 mm (15 in) Differential Drive ®
woofer
Nominal Impedance: 4 Ohms
Active Tunings: Tunings available at www.jblpro.com
Enclosure: 15 mm - 18 mm, multi ply birch plywood
Suspension / Mounting 
3: Top mounted M20 threaded socket for optional pole SS4-BK. 
Integrated flying hardware 
for use with array frame VRX-SMAF. Optional M10 eyebolt kit.
Transport: Integrated steel handle with backing cup
Finish 
4: Black DuraFlex™ finish
Grille 5: Powder coated, black, 18 gauge perforated steel with acoustical 
transparent black foam backing.
Input Connectors:  2x Neutrik
®Speakon NL-4 
Input connection modes: Switchable, +1/-1 or +2/-2
Dimensions (H x W x D): 496 mm x 420 mm x 597 mm (19.5 in x 16.5 in x 23.5 in)
Net Weight: 26 kg  (57 lb.)
Optional Accessories: SS4-BK: Adjustable, heavy-duty pole,  M20 thread to 35 mm pole mount 
WK-4S: Caster kit   
VRX-SMAF Array  Frame 
Eyebolt Kit (Part #229-00009-01)
FUNCTIONAL BLOCK DIAGRAM
1. IEC filtered noise with 6 dB crest factor, 2 hours.   
2. Calculated based on power rating and sensitivity.   
3. White version does not include pole mount feature.    
4. White version uses JBL Pro White Duraflex Finish.  
5. White version grille is powdercoated white with acoustically transpar\
ent white cloth backing.
4 Ohms
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							INTRODUCTION TO THE VRX915M
The VRX915M is a dedicated, compact and lightweight, 15, two way tourin\
g-class floor monitor, with only 
a 375 mm (14.75 in) stage height and JBL’s latest neodymium-magnet transducers.    
A 380 mm (15 in) 2265H patented Differential Drive
®woofer handles 800 watts (continuous) and delivers 
accurate and precise low frequency reproduction. The 2452H 102 mm (4 in) voice-coil compression driver is 
coupled to a 50° x 90° aluminum horn to provide smooth and clear high frequency reproduction, c\
ritical for high
performance monitoring. 
Bi-amp or full-range passive operation may be selected via a recessed, h\
igh-current switch mounted alongside
the NL4 input connector in one of the handle cups. An additional NL4 connector is mounted in the other handle
cup for a convenient loop-thru connection, minimizing cable runs on stag\
e. 
The enclosure is constructed of top quality Baltic birch plywood and is \
coated in JBL’s rugged DuraFlex™
finish. It is a symmetrical 30° wedge design, with four non-slip rubber feet per side enabling convenien\
t left and
right applications of adjacent monitors. The transducers are protected by an attractive 16 gauge CNC-machined
steel grille, which is internally lined with acoustically transparent fo\
am to provide additional transducer protection.  
DIMENSIONAL DRAWING FOR VRX915M
324
(12.75)
432
(17.00)
629
(24.75)159
(6.25)
375
(14.75)
546
(21.51)
191
(7.51)
Dimensions in mm (inches)
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							SPECIFICATIONS
VRX915M - 15” TWO-WAY STAGE MONITOR
System Type: 15 Two-way Stage Monitor
Frequency Range (-10 dB): 60 Hz - 20 kHz
Frequency Response (±3 dB): 70 Hz - 20 kHz
Coverage Pattern: 50° x 90° nominal
Crossover Modes: Passive / Bi-amp
Crossover Frequency: 1.1 kHz
Power Rating: Passive Full-Range 800 W / 1600 W / 3200 W, 2 hrs
1
(Continuous / Program / Peak) Bi-amp LF: 800 W / 1600 W / 3200 W, 2 hrs1
Bi-amp HF: 75 W / 150 W / 300 W, 2 hrs1
Maximum SPL:127 dB SPL continuous (133 dB SPL peak)2
System Sensitivity (1w @ 1m): 98 dB SPL
LF Driver:1 x JBL 2265H, 380 mm (15 in) Differential Drive
®woofer 8 Ohms
HF Driver: 1 x JBL 2452H, 100 mm (4.0 inch) diameter voice coil, 38 mm (1.5 inch) exit,\
 
neodymium magnet compression driver 8 Ohms
Nominal Impedance: 8 Ohms Full-Range Passive
Active Tunings: Settings available at http://www.jblpro.com/tunings/index.htm
Enclosure: Symmetrical stage monitor, 15/18 mm, Birch plywood.
Transport: 2x Integrated handle / input cup 
Finish: Black DuraFlex™ finish
Grille: Powder coated, black, 16 gauge perforated steel with acoustically transp\
arent 
black screen backing.
Input Connectors:  Neutrik
®Speakon®NL-4 (x2), one on each end
Dimensions (H x W x D): 629 mm x 432 mm x 324 mm (375 mm stage height)
24.75  in x 17 in x 12.75 in (14.75 stage height)
Net Weight: 21 kg (46.0 lb)
FUNCTIONAL BLOCK DIAGRAM
1.IEC standard, full bandwidth pink noise with 6 dB crest factor for speci\
fied period2.Calculated based on power rating and sensitivity.
JBL continually engages in research related to product improvement.  Some ma\
terials, production methods and design refinements are introduced 
into existing products without notice as a routine expression of that ph\
ilosophy.  For this reason, any current JBL product may differ in some respect
from its published description, but will always equal or exceed the orig\
inal design specifications unless otherwise stated.
-
+
+ -HIGH
FREQ
HIGH
FREQ
+
-
+ -LOW
FREQ
LOW
FREQ
1+1+1-1-
2-2-2+2+
1+1+1-1-
2-2-2+2+
1+1+1-1-
2-2-2+2+
1+1+1-1-
2-2-2+2+
NL4
IN / THRU
NL4
IN / THRU NL4
IN / THRU
NL4
IN / THRUHPF
PASSIVE MODE
BI-AMP MODE
LPF
Serial No.
VRX915M
BI-AMP
±1 LF: 8
±2 HF: 8 W
W PASSIVE
±1 IN: 8
±2 N/C
W
JBL PROFESSIONAL
Northridge, CA USA
Made in USA
VRX900
BI-AMP
PASSIVE
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							AMPLITUDE SHADING
AMPLITUDE SHADING
Amplitude shading is a technique that allows the coverage pattern of a l\
oudspeaker array to be shaped by
adjusting the relative acoustic output of some of the devices in the arr\
ay. Most often, array shading involves 
only the mid and high-frequency sections of the array. In a simple system consisting of three VRX932LA-1/
VRX928LAs, 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 i\
ncreased. The overall sound-
power in the room is unchanged but the distribution of acoustic energy t\
o the audience is far more uniform.
Amplitude shading of a VRX932LA-1/ VRX928LA 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 are\
a. The +3 dB position will be used for the 
speaker(s) covering the more distant areas; or to compensate for the l\
ow-frequency build-up resulting from
mutual coupling of multiple woofers in an array. 
Short Throw (-3 dB)Long Throw (+3 dB)Medium Throw (0 dB)
FREQUENCY RESPONSE
The frequency response graph represents measurements from a single typic\
al VRX900LA speaker, applying the
three different ACS settings: +3dB, 0dB, -3dB.
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							BI-AMPLIFIED SYSTEM
In a bi-amplified system, array shading is accomplished by connecting se\
parate amplifier channels to the HF 
section of each VRX932LA-1/VRX928LA. In larger arrays, a single amplifie\
r channel may be used for two 
adjacent loudspeakers. Array shading is then accomplished by adjusting the gain of the HF ampli\
fier channels.
For extremely precise control over system performance, it may also be de\
sirable to dedicate an individual 
system controller output to each HF amplifier channel.
+3 dB
0 dB
-3 dB
Audience
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 bot\
tom speaker -3 dB.
Please note that when operated in bi-amp mode, the VRX932LA-1 requires a\
 unique DSP preset that is different
from the preset required for bi-amplified operation of the VRX932LA. Whe\
n operated in bi-amp mode,
VRX932LA and VRX932LA-1 performance is fully compatible provided that the correct\
 preset is used for 
processing the respective models. 
Please visit www.jblpro.com/tunings for latest versions of our recommended system tuning\
s or call customer 
service at Toll Free 1-800-852-5776.
SYSTEM PROCESSOR TUNINGS
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							DEPLOYING THE SYSTEM
The VRX932LA-1/VRX928LA is a flexible speaker system that can be deployed in ground-supported or\
 
suspended applications. The following information will help you set up your VRX932LA-1/VRX928LA
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 design\
ed 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 an\
d do not use equipment with  worn, damaged, or missing parts.
• Do not attempt to place more than two VRX932LA-1/VRX928LA loudspeakers on a stand or pole. 
• When mounting two VRX932LA-1/VRX928LA 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 b\
ase 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-1/VRX928LA cabinets may be mounted onto either a JBL SS2-BK  tripod stand or with the SS4-BK adjustable pole mount to their companion\
 VRX918S,VRX915S 
or SRX718S subwoofers.  Do not mount VRX932LA-1 cabinets on top of the compact VRX915S subwoofer! 
.
SINGLE VRX932LA-1/VRX928LA
A single VRX932LA-1 may be used on a tripod stand (JBL SS2-BK) or on a
pole (JBL SS4-BK) over its companion subwoofer the VRX918S or the
SRX718S. The use of a subwoofer is recommended 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 “Sh\
ort Throw
(-3 dB)” position when a single speaker is used.
A single VRX928LA may be used on a tripod stand (JBL SS2-BK) or on a pole 
(JBL SS4-BK) over its compact companion subwoofer the VRX915S or the
larger VRX918S/SRX718S subwoofer models. 
The VRX932LA-1/VRX928LA includes a dual angle 36 mm pole mount socket. 
By selecting the appropriate pole socket and adjusting the height of the\
 tripod
or pole, optimum coverage may be achieved. Ideally, the audience should not
be able to see either he bottom or the top surfaces of the speaker. This will
insure that all listeners are within the included coverage angle of th\
e loud-
speaker. The rear pole-socket will position the speaker with the baffle 2.5° to
the floor while the forward socket will position the speaker with the ba\
ffle
angled down by 15°. System illustration shows the  available JBL SS2-BK 
tripod stand. 
NOTE: VRX932LA-1WH/VRX928LA-WH does not include pole mount features
and is designed specifically for fixed installations.
All of the information in this section for VRX932LA-1 also applies to previous VRX932LA systems.
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							DUAL VRX932LA-1/VRX928LA
Unlike most conventional speakers, the VRX932LA-1/
VRX928LA is designed so that a pair of speakers may be safely
mounted onto a pole or tripod stand. For most applications, the
forward 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 speakers 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 available JBL
SS4-BK speaker pole and SRX718S subwoofers. Do not stack
more than two VRX932LA-1 / VRX928LA speakers on a pole.
LOCKING (2) VRX932LA-1/VRX932LA-1WH/VRX928LA/VRX928LA-WH LOUDSPEAKERS TOGETHER
Any time two or more VRX932LA-1/VRX928LAs are arrayed together, they must be mechanically secured to 
each other using the integral rigging frame and supplied quick release p\
ins. See the diagram below for details.
Safe combinations are:
VRX918S with VRX932LA/VRX932LA-1/VRX932LA-WH/VRX932LA-1WH
VRX915S with VRX928LA/VRX928LA-WH 
WARNING: Only the correct quick release pins supplied by JBL are to be used.
All of the information in this section for VRX932LA-1 also applies to previous VRX932LA systems.
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							Correct use of all rigging hardware is required for secure system suspen\
sion. Careful calculations should 
always be performed to ensure that all components are used within their \
Maximum Load Limit before the array
is suspended. Never exceed the maximum recommended load ratings. Prior t\
o suspending the system, an
expert, trained and experienced in flying speaker systems should be cons\
ulted. Research and understand the
codes, practices, and requirements in the venues where you intend to ope\
rate your sound system.
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 ins\
pected at least annually. The inspection
shall include a visual survey of all corners and load bearing surfaces f\
or signs of cracking, water damage, 
de-lamination, or any other condition that may decrease the strength of \
the loudspeaker enclosure.  Accessory
rigging hardware provided with or for the JBL VRX932LA-1/VRX932LA-WH/VRX928LA or VRX918S/VRX915S
loudspeaker must be inspected for fatigue at least annually or as requir\
ed by local ordinance. For all other 
hardware and fittings, refer to the hardware manufacturers inspection a\
nd 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™ (www.riggingseminars.com) or by Chain Motor Hoist manufacturers like Columb\
us McKinnon Corp. 
(manufacturers of the C/M Lodestar).
• Meet and establish a relationship with a licensed mechanical or structur\
al 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.
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 appl\
icable, 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 o\
r the misuse of this information for any
purpose. Furthermore, JBL is not responsible for the abuse of its products caused by avoiding comp\
liance with
inspection and maintenance procedures or any other abuse.
SUSPENSION SAFETY WARNINGS!
All of the information in this section for VRX932LA-1 also applies to previous VRX932LA systems.
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							INSTALLING THE ARRAY FRAME
The array frame is attached to the internal rigging of the VRX900 system\
 using the provided Quick Release Pins
WARNING:Do not use any substitute for these pins. 
1. Begin by attaching the two side arms (A) to either side of the cent\
er frame. Use a pair of the provided Quick
Release Pins (B)* to attach the arms to the frame. Note: Side arms sho\
uld 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. [NOTE: The
arms of the VRX932LA-AF and VRX-AF are deliberately
designed so as not to be interchangeable. The arms of the
VRX-SMAF are already attached.
2. Place the entire array frame on top of the VRX900 system
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.
*(B) does not apply to VRX-SMAF
MAXIMUM ARRAY SIZE
There are three variations of the VRX array frame. The VRX-AF supersedes the VRX932LA-AF. The VRX-SMAF
is solely intended for use with the VRX928LA and VRX915S. Before suspending a VRX array, determine which
version of the array frame you have and consult the table below to deter\
mine the maximum number of speakers
that may be safely suspended. The subwoofers must always be at the top of the array. 
(C) (A)
(D) (B)*
(A)
(D)
VRX-AF Array Frame
Maximum number of VRX918S in array 6543210
Maximum number of VRX932LA-1 in array0123456
VRX932LA-AF Array Frame
VRX-SMAF Array Frame
Maximum number of VRX918S in array43210
Maximum number of VRX932LA-1 in array12345
VRX932LA-AF ARRAY FRAME
The following table defines the maximum number of speakers that may be s\
uspended using the VRX932LA-AF frame.
A minimum design factor of 7:1 is maintained for all speaker configuration\
s at or below those indicated in the table.
VRX-AF ARRAY FRAME
The following table defines the maximum number of speakers that may be s\
uspended using the VRX-AF frame.  A
minimum design factor of 7:1 is maintained for all speaker configuration\
s at or below those indicated in the table. 
VRX-SMAF ARRAY FRAME
The following table defines the maximum number of speakers that may be s\
uspended using the VRX-SMAF 
array frame.  A minimum design factor of 7:1 is maintained for all speaker configuration\
s at or below those 
indicated in the table.
The VRX subwoofers must always be on top of the array. 
Maximum number of VRX915S in array432220
Maximum number of VRX928LA in array023456
19
All of the information in this section for VRX932LA-1 also applies to previous VRX932LA systems.
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							GROUND-STACKED, UPWARD FIRING ARRAYS
Applications such as covering stadium bleachers from the playing field m\
ay be addressed by installing the
VRX932LA-AF/VRX-AF/VRX-SMAF array frame to the bottom of the array.
Up to four VRX932LA-1/VRX928LA loudspeakers may be locked together and
ground stacked using the VRX array frame kit, as shown. 
WARNING:Do not ground stack more than four VRX932LA-1/VRX928LA
loudspeakers in one array. 
When ground stacking VRX900LA loudspeakers, use the VRX932LA-AF/
VRX-AF/VRX-SMAF array frame as the base (as shown) by attaching the lo\
ose
drop levers, included in the array frame kit, to the lower rigging bar o\
n the
VRX900LA loudspeaker. When stacking the loudspeakers together, make sure
each loudspeaker is locked together. Be certain that the surface on which the
system is to be stacked is flat, stable and solid. 
SUSPENSION IN PERMANENT INSTALLATIONS
For permanent installation applications a VRX array may be suspended usi\
ng M10 eyebolts. Only load-rated,
forged shoulder eyebolts are to be used.  A kit consisting of three (3) forged shoulder eyebolts is available from\
JBL Professional as part number 229-00009-01.  Suspension of the VRX array m\
ust employ both top attachment
points. The VRX918S and VRX915S subwoofers must always be at the top of the arra\
y.
EYEBOLT SUSPENSION 
The following table defines the maximum number of speakers that may be s\
uspended using the two M10 
eyebolt attachment points provided on the cabinets.  A minimum design factor of 7:1 is maintained for all 
speaker configurations at or below those indicated in the table.  
Maximum number of VRX918S in array 543210
Maximum number of VRX932LA-1 in array024566
Maximum number of VRX915S in array432220
Maximum number of VRX928LA in array023456
EYEBOLT SUSPENSIONARRAY FRAME SUSPENSION
20
All of the information in this section for VRX932LA-1 also applies to previous VRX932LA systems.
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