JBL VRX932LAP - Page 2

 VRX932LAP 12" Two-Way Powered Line Array Loudspeaker System
Block Diagram
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 VRX932LAP’s, 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.
The -3 dB position of the HF output level selector 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.
For single speaker applications the -3 dB HF-output level is
recommended for best tonal balance.
PEAKSIGPWR
LINE
SELECT
0dB-16dB
100-120/220-240V~
AC LINE INPUT
50/60 Hz 5A 600W
12A 1440W MAX
AC LOOP OUTPUT
100-120/220-240V~
50/60Hz 7A 840W
CLASS 1 WIRING
AUDIO
OUT
AUDIO
IN
N108
RESET
VRX932LAP
VRX932LAP
Designed, Engineered and Assembled in USA
Equipped with Differential Drive
®
Transducer Technology.
U.S. PATENTS: 5,748,760; 6,768,806;
6,847,726; 6,774,510; and D483,743.
JBL DrivePack
®
DPC-2 system
Serial No.
ATTENUATION
PUSH
0dB
-
3dB
+
3dB
Array Configuration Selector
HF OUTPUT LEVEL
VRX-AF Array Frame Accessory
The VRX-AF is an array frame kit designed to be used
for suspension of the VRX932LAP 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. A
minimum design factor of 7:1 is maintained for all
speakers configuration at or below those indicated in the
table:
Maximum number of VRX918SP in array: 023344
Maximum number of VRX932LAP in array: 543210
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 VRX932LAP 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 VRX-AF array frame to the bottom of the array as described above. Up to four
VRX932LAP loudspeakers may be locked together and ground stacked using the VRX-AF array frame kit, as
shown.
75015_JBL_VRX932LAP 8/16/07 7:14 AM Page 2