JBL VRX932LA-1 User Manual

12" Two-Way Constant

VRX932LA-1

Key Features:



JBL’s exclusive neodymium magnet
Differential Drive
capacity and light-weight.



VRX932LA-1 features 3 x 2408J Annular
Ring Diaphragm HF drivers. The 2408
represents the latest in JBL Professional
compression driver design.



Constant Curvature waveguide for
unprecedented array coherence.



Dual angle pole socket for aiming
flexibility. One or two speakers may be
mounted to a 35 mm pole or tripod
stand.



Integral rigging hardware for simple
connection of enclosures and optional
array frame. Arrays of up to six
enclosures may be flown.



Array Configuration Selector permits
“array shading” in passive mode.

Application:



Music playback and sound
reinforcement in mid-size venues.

 Entertainers, corporate A/V professional and

sound system hire companies.

VRX932LA-1 12" Two-Way
Line Array Speaker

The VRX932LA-1 is a light-weight
(46 lb / 21 kg) compact 12" two-way line
array speaker system designed for use in
arrays of up to six units. VRX932LA-1 is
the ideal choice when line array
performance is needed but the venue size
doesn’t call for the very long-throw
characteristics of larger line arrays such as

ERTEC

JBL’s V

The Constant Curvature waveguide
mounts three compression drivers on a
continuous arc. When additional
VRX932LA-1 speakers are added to the
array the uninterrupted arc continues. In
effect, all the drivers work together as if
they were a single driver on a very long
waveguide. Since there are three drivers
in each VRX932LA-1, the combined
power handling and acoustic output of
the system is far greater than a single
driver could achieve.

VRX932LA-1 uses “amplitude shading”
to shape the coverage of the array.
Switches on the input plate allow, for
example, the upper box in an array to
reach a distant balcony while the lower
HF section is shaded back to reduce
excessive level at the front of the
listening area.

One or two VRX932LA-1’s may also be
used on a tripod or over subwoofers. The
integral rigging hardware is used to
securely lock the array together while the
dual-angle pole socket provides aiming
flexibility.

As many as six VRX932LA-1 speaker
systems may be suspended in a single

®

woofer for high-power

®

.

Curvature Line Array

array for a nominal vertical coverage of up to 90°. Suspended applications require
the JBL VRX-AF array frame (available separately). For applications in which the
array must be aimed sharply down, a second array frame may be installed to the
bottom of the array serving as a pull-back.

VRX918S subwoofers are the ideal choice for a ground-stacked or flown
VRX932LA-1 system. The SRX718S subwoofer is also compatible when suspension is
not required.

The VRX932LA-1 is manufactured and sold under U.S. patents 5,748,760;
6,112,847; 6,394,223; 6,847,726; 6,768,806; 6,774,510; and D483,743

Specifications:

Frequency Range (-10 dB)1: 57 Hz - 20 kHz

Frequency Response (±3 dB)1: 75 Hz - 20 kHz

(Continuous/Program/Peak)2: Bi-amp LF: 800 W / 1600 W / 3200 W

System Sensitivity (1w @ 1m): 95 dB SPL (passive mode)

1

“Frequency Range” and “Frequency Response” are based on half-space conditions

2

IEC filtered noise with 6 dB crest factor, 2 hrs.

3

HF driver sensitivity is based on a measurements averaged between 1.5 kHz - 16 kHz

JBL continually engages in research related to product improvement. Changes introduced into existing products
without notice are an expression of that philosophy.

Coverage Pattern: 100° x 15° nominal
Crossover Modes: Bi-amp / passive, externally switchable

Crossover Frequency: 1.2 kHz

Power Rating Passive: 800 W / 1600 W / 3200 W

Bi-amp HF: 75 W / 150 W / 300 W

System Maximum SPL

Nominal Impedance: Passive: 8 ohm

Active Tunings: Tunings available at www.jblpro.com

Suspension / Mounting: Optional VRX-AF line array frame kit; M-10 Eyebolt Kit

Input Connectors: Neutrik®Speakon®NL-4 (x2)

Dimensions (H x W x D): 349 mm x 597 mm x 381 mm

Net Weight: 21 kg (46 lb)

Optional Accessories: VRX-AF: Suspension array frame

2

: 130 dB SPL peak (passive mode)

LF: 130 dB
HF: 139 dB

LF: 95 dB (Bi-Amp mode)

LF Driver: 1 x JBL 2262H 305 mm (12 in) Differential Drive

HF Driver: 3 x JBL 2408J, 38 mm (1.5 in) voice-coil, neodymium

Enclosure: 18 mm, 11-ply birch plywood.

HF: 114 dB3(Bi-Amp mode)

neodymium magnet, dual voice-coils, and dual magnetic gaps.

compression driver

Bi-amp LF: 8 ohms
Bi-amp HF: 8 ohms

Finish: Black DuraFlex™ finish

Grille: Powder coated, black, 16-gauge perforated steel with acoustically

transparent foam

(13.75 in x 23.5 in x 15.0 in)

SS2-BK: Tripod speaker stand
SS3-BK: Satellite speaker pole
SS4-BK: Adjustable satellite speaker pole to be used with the
VRX918S and SRX718S only.
M-10 eyebolt kit

®

woofer with

 VRX932LA-1 12" Two-Way Constant Curvature Line Array

Block Diagram

NL4

INPUT

PASSIVE

MODE

NL4

INPUT

LONG THROW

MID THROW

1+
1-

2+
2-

1+
1-

2+
2-

SHORT THROW

+3 dB

0 dB

-3 dB

LPF

HPF

-

+

-

+

-

+

NL4

INPUT

1+
1-

2+
2-

BI-AMP

MODE

+

-

NL4

INPUT

1+
1-

2+
2-

Array Configuration Selector (ACS)

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 VRX932LA-1s, 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-1 array may be
accomplished in passive or bi-amplified systems.

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 speaker(s) covering the more
distant areas, or to compensate for the low-frequency build-up resulting from mutual
coupling of multiple woofers in an array.

PASSIVE

±1 IN: 6

Ω

±2 N/C

VRX932LA-1

Serial No.

+

-

+

+

-

PARALLEL

-

+

-

BI-AMP

±1 LF: 8
±2 HF: 6ΩΩ

JBL PROFESSIONAL
Northridge, CA USA
Made in USA

VRX-AF Array Frame Accessory

The VRX-AF is an array frame kit designed to be used
for suspension of the VRX932LA-1 line array loudspeaker.
The optional array frame kit includes an array frame, four
quick release pins, a pair of forged 3/8" shackles, and a
pair of drop levers.

The following table defines the maximum number of
speakers that may be suspended using the VRX-AF frame.
A minimum design factor of 7:1 is maintained for all
speaker configurations at or below thosed indicated in the
table.

Maximum number of VRX918S in array 6543210
Maximum number of VRX932LA-1 in array 0123456

For some applications, it may be necessary to pull back the array from the bottom in order to achieve the
desired coverage. Every VRX-AF is supplied with a spare set of quick release pins and a pair of spare drop levers
that are used to adapt a second array frame to the bottom of a VRX932LA-1 array. Once these are installed on the
bottom enclosure, the array frame may be attached as previously described.

Ground-stacked, upward aimed array: Applications such as covering stadium bleachers from the playing field
may be addressed by installing the VRX-AF array frame to the bottom of the array as described above. Up to four
VRX932LA-1 loudspeakers may be locked together and ground stacked using the VRX-AF array frame kit, as shown.