JBL VRX932LA-1 User Manual

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JBL VRX932LA-1 User Manual

VRX932LA-112" Two-Way Constant

Curvature Line Array

Key Features:

JBL’s exclusive neodymium magnet Differential Drive® woofer for high-power 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 JBL’s VERTEC®.

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

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

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

(Continuous/Program/Peak)2: 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 mode)

LF: 130 dB

HF: 139 dB

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

LF: 95 dB (Bi-Amp mode)

HF: 114 dB3 (Bi-Amp mode)

LF Driver: 1 x JBL 2262H 305 mm (12 in) Differential Drive® woofer with neodymium magnet, dual voice-coils, and dual magnetic gaps.

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

Nominal Impedance: Passive: 8 ohm

Bi-amp LF: 8 ohms

Bi-amp HF: 8 ohms

Active Tunings: Tunings available at www.jblpro.com

Enclosure: 18 mm, 11-ply birch plywood.

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

Finish: Black DuraFlex™ finish

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

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

Dimensions (H x W x D): 349 mm x 597 mm x 381 mm (13.75 in x 23.5 in x 15.0 in)

Net Weight: 21 kg (46 lb)

Optional Accessories: VRX-AF: Suspension array frame

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

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

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

3HF 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.

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

Block Diagram

1+

NL4 1- INPUT 2+

2-

PASSIVE

MODE

NL4 1+ INPUT 1-

2+

2-

LONG THROW

 

+3 dB

-

 

0 dB

+

 

 

MID THROW

 

-

 

 

HPF

 

 

+

 

-3 dB

-

 

 

SHORT THROW

 

+

+

LPF

-

Array Configuration Selector (ACS)

 

+

 

-

 

+

NL4 1+

-

INPUT 1-

+

2+

-

2-

 

BI-AMP

MODE

NL4

1+

+

-

INPUT

1-

 

 

2+

 

 

2-

 

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

BI-AMP

±1 IN: 6PARALLEL

±1 LF: 8

±2 N/C

±2 HF: 6

VRX932LA-1

Serial No.

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

6

5

4

3

2

1

0

Maximum number of VRX932LA-1 in array

0

1

2

3

4

5

6

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.

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