QSC ILA, ILA WL2082-i, ILA WL115-sw Installation Manual

Features of the WL2082-i

• Installation-optimized design brings affordable and
uncompromised line array performance to a broader range
of venues

• True line array performance – individual speaker elements are
designed to function in a coherent array

• Compact and attractive appearance, available in black and white,
harmonizes with any installation environment

• Wide 140° horizontal coverage

• Economical and easy-to-install suspension system with ample
array adjustability

Features of the WL115-sw

• Single 15" subwoofer in a 4th order bandpass enclosure

• 650 watt power capacity

• Frequency range to 35 Hz

ILA Series

Installation Line Array

WL2082-i | WL115-sw

• May be suspended at the top of a WL2082-i array or behind the
array (requires optional accessory items)

• Available in black or white to harmonize with venue décor

Line array systems have become the primary
loudspeaker configuration for tour sound
and many large installations. With the advent
of the WideLine WL2082-i Installation Line
Array (ILA), QSC offers a professional system
at breakthrough pricing making line array
performance accessible to a far broader range
of house of worship and performance venues.
Most line array systems currently available are
designed for touring applications. As a result,
the overall system cost is driven beyond the
means of many facilities that could benefit from
line array acoustic performance. By focusing
on installation applications, using a molded
enclosure and simplifying the rigging design,
QSC was able to drive cost out of the system
while retaining the sound quality, coverage and
power of high end touring systems.

Each Installation Line Array element uses a
pair of high-power, neodymium magnet, 8"
diameter low frequency drivers in a two-and-a­half way configuration. Both woofers produce
low frequencies but only one covers the mid­range resulting in more uniform directivity in
the crossover region. For high frequencies, a
pair of 1.75" (voice-coil diameter) neodymium
compression drivers with titanium domes are

mounted on a multiple aperture diffraction
waveguide that provides extremely wide
coverage (140º). As a result, a WL2082-i
system will rarely require additional side or
center fill speakers and solid stereo imaging is
preserved across the listening area.

The system may be used in bi-amplified or
tri-amplified mode. In general, the tri-amplified
mode will produce the best performance and,
for arrays larger than four boxes, will not
increase the total cost of system amplification.

The low frequency range of a WL2082-i array
will be adequate for speech, voice and many
acoustic music uses. For reinforcement of
program material with more demanding low
frequency content a companion subwoofer,
the WL115-sw, is also available. The
WL115-sw is a 15" subwoofer using a 4th order,
bandpass enclosure. Tooled ports with gently
rounded terminations inside and out eliminate
port turbulence distortion. Mesh grilles are
integrated into the port design to obstruct the
entrance of foreign objects into the enclosure.

Many users of line array systems have found
that suspending the subwoofers with the array

provides audible benefits. In addition, some
venues lack room for floor mounted subs. For
these reasons, the WL115-sw includes rigging
hardware and, with selection of the appropriate
rigging accessories, subwoofers may be flown
at the top of an array or behind as pictured.

Rigging for the ILA is simple, flexible and safe
providing a 10:1 design factor with twelve
WL2082-i systems in the array (see the owner’s
manual for details before planning any array
suspension). The array is assembled with the
included bolts and the relative angle between
adjacent boxes is adjustable in 1º increments
for precise tailoring of vertical coverage. For
portable applications an optional kit of four
quick release pins is available.

Available in black or white, the WL2082-i
enclosure is made of high impact polystyrene
with extensive internal ribs to eliminate acoustic
losses due to sidewall flex. The Installation Line
Array may be used in outdoor applications
where the system is not directly exposed
to the elements. The enclosure material is
formulated with UV inhibitors, the grille is
made of aluminum and the woofer cones are
weather resistant.

ILA Series Installation Line Array

WL2082-i WL115-sw

Configuration 2½-way, bi-amp or tri-amp mode 4th order bandpass subwoofer

Transducers
High-frequency Dual 50 W, 8Ω 1" exit, 1.75" titanium diaphragm, −
neodymium magnet assembly

Low-frequency Dual 200 W, 16Ω 8" woofer, 2" voice coil, 650 W, 8Ω 15" woofer with a 4" voice coil, ceramic magnet assembly
neodymium magnet assembly, weather resistant cone

Frequency Response (±3 dB) 80 Hz - 20 kHz 37 Hz - 107 Hz

Frequency Range (-10 dB)

Nominal Impedance HF: 16Ω −

LF bi-amp mode: 8Ω −

LF tri-amp mode: 16Ω (x 2) LF: 8Ω

Continuous Power Capacity
/ Recommended Power

LF bi-amp mode: 400 W / 800 W −

LF tri-amp mode: 200 W / 400 W (x 2) LF: 650 W / 1300 W

Sensitivity (1 W at 1 m) HF: 106 dB −

LF: 96 dB LF: 96 dB

Maximum Output HF: 126 dB / 132 dB
Continuous / Peak (SPL at 1 m)

LF: 122 dB / 128 dB LF: 124 dB / 130 dB

Nominal Coverage H: 140° −

V: dependent on number of elements used −

Cabinet Type Ported, elliptical / trapezoidal 4th order bandpass

Enclosure Material HIPS (high impact polystyrene) with UV protectant 18 mm baltic birch plywood

Finish Available in black (WL2082-i BLK) or white (WL2082-i WHT) paintable Available in black (WL115-sw BLK) or white (WL115-sw WHT) paintable

Grille Perforated, formed aluminum −

Connectors 2 x NL8 in parallel 2 x NL8 in parallel

Pin Outs Pins Bi-Amp Tri-Amp Pins

1+/1- NC NC 1+/1- Sub

2+/2- NC LF2 2+/2- NC

3+/3- LF LF1 3+/3- NC

4+/4- HF HF 4+/4- NC

Attachment Points Integral, side plate adjustable rigging system, vertical splay Integral, non-adjustable (straight array only)
adjustable in 1° increments from 0° - 10°

Weight (Net / Shipping) 37 lbs (16.8 kg) / 45 lbs (20.45 kg) 111 lbs (50.4 kg) / 121 lbs (55 kg)

Dimensions (HWD) 11.8" x 27" x 13.4" (300 mm x 686 mm x 340 mm) 22.1" x 27" x 30.25" (561 mm x 686 mm x 768 mm)

Accessories Available FB2082-i: Fly-bar for WL2082-i and WL115-sw. Available in black or white.

EB2082-i: Extension bar, allows WL115-sw to be suspended behind WL2082-i. Available in black or white.

PB2082-i: Pullback bar for WL2082-i. For use when pulling back the bottom of the array is necessary to achieve the desired angle.
Available in black or white.

QRP-KIT-1: Kit of four (4) Quick Release Pins for use in lieu of included bolts.

1) 2 hours, IEC specified noise

1

68 Hz - 22 kHz 35 Hz - 112 Hz

HF: 100 W / 200 W −

Specifications subject to change without notice.

Array Configurations

The following table provides information regarding the maximum number of WL2082-i line
array elements and WL115-sw subwoofers that may be suspended using various configurations
of the available suspension accessories. The calculations for this table are based on a 10:1
design factor. See owner’s manual for detail before designing or suspending array. While a single
WL2082-i may be used for some specialized applications such as stage lip front fill, or under
balcony fill three or more ILA elements are required before the system begins to perform as a
true line array.

Configuration Maximum WL2082-i in array Maximum WL115-sw in array

Single FB2082-i 12 0

8 2

5 3

0 4

Dual FB2082-i with EB2082-i 12 3
(subwoofers behind line array)

10 4

Specifications

Aiming the ILA

Aiming and array configuration of an ILA system is supported by EASE
Focus. Focus is a two-dimensional acoustic simulation application that
calculates vertical coverage of a venue by a line array system. This free
software may be downloaded from the support section of the QSC
website at www.qscaudio.com.

Horizontal Polar Plots (Individual enclosure)

Ratio vs AngleRatio vs Angle

Specifications subject to change without notice.

ILA Series Installation Line Array

Dimensions

WL2082-i

27"

686 mm

Top

SideFront

13.4"

340 mm

11.8"

300 mm

WL115-sw

Front

27"

686 mm

Top

561 mm

22.1"

Side

30.25"

768 mm

20.1"

511 mm

Specifications subject to change without notice.

1675 MacArthur Boulevard • Costa Mesa, CA 92626 • Ph: 800/854-4079 or 714/957-7100 • Fax: [phone]

ILA Spec Sheet 0 6/13/06

qscaudio.com