QSC LA108 User manual

L Class User Manual
LA108 and LA112 Active Line Array Loudspeakers
LA108 LA112
TD-001676-01-A
*TD-001676-01*

Contents
Explanation Of Symbols.................................................................................5
Important Safety Instructions .............................................................................5
Rigging Safety Regulations: ...................................................................................6
General Rules for Suspension..................................................................................6
Shock Loading ........................................................................................7
Maximum Suspended Load ..............................................................................7
FCC Statements ........................................................................................7
LA108 Loudspeaker .........................................................................................7
LA112 Loudspeaker..........................................................................................8
Warranty.............................................................................................8
Introduction...........................................................................................9
Key Features and Technologies ................................................................................9
What’s in the Box ...........................................................................................9
LA 108 Features ...........................................................................................10
LA112 Features ............................................................................................11
LA108 and LA112 Deployment Options ...................................................................12
Ground Deployment (LA108 options shown) ....................................................................12
Flown Deployment (LA108 options shown)......................................................................12
QSC RapidDeploy™Rigging System ......................................................................13
Loudspeaker Attachment Points ...............................................................................13
Loudspeaker Angle Controls .................................................................................13
Understanding Splay Angles .................................................................................14
Progressive Splay Angle Rule ....................................................................................... 14
How to Manually Total Array Angles.................................................................................15
Ground Deployment ...................................................................................16
Pole Mounted on a Tripod Stand ..............................................................................16
LA108 Loudspeaker ..............................................................................................16
LA112 Loudspeaker ...............................................................................................16
Pole Mounting a Loudspeaker to a Tripod .............................................................................16
Stacking an Array on a Tripod Pole Mount ............................................................................17
Splay Angle Adjustment on a Tripod Mount ...........................................................................17
Decreasing Angle ................................................................................................18
Increasing Angle .................................................................................................18
Pole Mounted Over a Subwoofer(s) ...........................................................................18
LA108 Loudspeaker ..............................................................................................18
LA112 Loudspeaker ...............................................................................................20
Pole Mounting a Loudspeaker over a Subwoofer(s) .....................................................................21
Stacking an Array on a Pole Mount over a Subwoofer(s).................................................................21
Splay Angle Adjustment on a Pole Mount over a Subwoofer(s) ............................................................22
Decreasing Angle ................................................................................................22
Increasing Angle .................................................................................................22

Stacking over a Subwoofer(s) ................................................................................23
LA108 Loudspeaker ..............................................................................................23
LA112 Loudspeaker ...............................................................................................23
Attaching an Array Frame and Stack Adapter Kit to a Subwoofer ..........................................................24
Attaching a Loudspeaker to a Subwoofer .............................................................................25
Detaching a Loudspeaker from a Subwoofer...........................................................................26
Stacking an Array of Loudspeakers on a Subwoofer.....................................................................26
Splay Angle Adjustment for a Subwoofer Stack ........................................................................27
Decreasing Angle ................................................................................................27
Increasing Angle .................................................................................................27
Front Fill (Stage-Lip) ........................................................................................27
Ground Stack .............................................................................................28
Preparing an Array Frame and Stack Adapter Kit for a Ground Stack.......................................................28
Attaching a Loudspeaker to an Array Frame for a Ground Stack...........................................................29
Detaching a Loudspeaker from an Array Frame for a Ground Stack ........................................................29
Stacking an Array of Loudspeakers for a Ground Stack ..................................................................29
Splay Angle Adjustment for Ground Stack.............................................................................30
Decreasing Angle ................................................................................................30
Increasing Angle .................................................................................................31
Horizontal Array...........................................................................................31
Stacked Horizontal Array ..........................................................................................32
Splay Angle Adjustment for Stacked Horizontal Array ...................................................................33
Detaching Loudspeakers from a Stacked Horizontal Array................................................................33
Flown Deployment ....................................................................................34
Flown Deployment with an Array Frame ........................................................................34
Array Frame Pre-Assembly.........................................................................................34
Array Frame Attachment Preparation.................................................................................34
Attaching a Loudspeaker to the Array Frame ..........................................................................34
Attaching Loudspeakers for an Array.................................................................................35
Detaching Loudspeakers from an Array...............................................................................35
Detaching a Loudspeaker from the Array Frame ........................................................................36
Splay Angle Adjustment for Flown Deployment.........................................................................36
Decreasing Angle ................................................................................................36
Increasing Angle .................................................................................................36
Pick-Point Deployment ......................................................................................37
Single Pick-Point Deployment .......................................................................................37
Bridle Deployment................................................................................................37
Adjusting the Tilt Angle of the Array on a Pick-Point Deployment...........................................................37
Optional Eyebolt .................................................................................................37
Rear Panel Connections ................................................................................38
System Power .............................................................................................38
AC Mains Connections ......................................................................................39
Connecting to AC Mains ..........................................................................................39
Daisy-Chaining with Power Cable Jumpers ............................................................................39
Compatible QSC Accessories ..................................................................................39
Daisy-Chaining Procedure .........................................................................................40

Recommended Configurations ......................................................................................40
LA108 Loudspeaker ..........................................................................................40
LA112 Loudspeaker ..........................................................................................40
Power On Sequence ..............................................................................................41
Power Off Sequence ..............................................................................................41
Analog Audio Connections ..................................................................................41
XLR Connections .................................................................................................41
Daisy-Chaining with Balanced XLR Jumper Cables ......................................................................42
Network Connections .......................................................................................42
Daisy-Chaining with Network Jumper Cables ..........................................................................42
Connecting to a Network ..........................................................................................43
Network Control .................................................................................................43
Dante®Audio Setup ..............................................................................................43
Cooling ..................................................................................................43
Outdoor Installations .......................................................................................44
Rear Panel User Interface...............................................................................44
Navigating the Rear User Interface ............................................................................44
Menu Map......................................................................................................44
Home Screen ....................................................................................................45
Home Screen Status ..........................................................................................45
Top Bar ....................................................................................................45
Network Icon ...............................................................................................46
Ar-Q™(Array Equalization) ....................................................................................46
High-Pass Filter ..............................................................................................46
EQ........................................................................................................46
Menu ..........................................................................................................46
Settings ........................................................................................................47
Utilities ........................................................................................................47
Additional Functions ..............................................................................................47
DSP Features ..............................................................................................48
L Class Accessories ....................................................................................48
Transportation.............................................................................................48
Interconnect Jumpers .......................................................................................48
Between Loudspeakers ......................................................................................48
Temporary Outdoor Use. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Sub-stacking ..............................................................................................49
LA108 Loudspeaker ..............................................................................................49
LA112 Loudspeaker ...............................................................................................49
Flown (Portable or Installed) .................................................................................49
Flown (Installed Only) ......................................................................................49
Additional Information .................................................................................49
Care and Maintenance......................................................................................49
QSC Self Help Portal .......................................................................................50
Customer Support ..........................................................................................50
Warranty.................................................................................................50

5
EXPLANATION OF SYMBOLS
The term “WARNING!” indicates instructions regarding personal safety. If the instructions are not followed, the result may be bodily
injury or death.
The term “CAUTION!” indicates instructions regarding possible damage to physical equipment. If these instructions are not followed, it
may result in damage to the equipment that may not be covered under the warranty.
The term “IMPORTANT!” indicates instructions or information that are vital to the successful completion of the procedure.
The term "NOTE" is used to indicate additional useful information.
NOTE: The intent of the lightning flash with arrowhead symbol in a triangle is to alert the user to the presence of un-
insulated “dangerous” voltage within the product’s enclosure that may be of sufficient magnitude to constitute a risk of
electric shock to humans.
NOTE: The intent of the exclamation point within an equilateral triangle is to alert the user to the presence of important
safety, and operating and maintenance instructions in this manual.
IMPORTANT SAFETY INSTRUCTIONS
WARNING!: TO PREVENT FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR
MOISTURE.
WARNING!: Before placing, installing, rigging, or suspending any loudspeaker product, inspect all hardware,
suspension, cabinets, transducers, brackets and associated equipment for damage. Any missing, corroded, deformed, or
non-load rated component could significantly reduce the strength of the installation or placement. Any such condition
severely reduces the safety of the installation and should be immediately corrected. Use only hardware which is rated for
the loading conditions of the installation and any possible short-term, unexpected overloading.
Never exceed the rating of the hardware or equipment.
Consult a licensed, professional engineer regarding physical equipment installation. Ensure that all local, state and national
regulations regarding the safety and operation of loudspeakers and related equipment are understood and adhered to.
WARNING!: The LA108 weighs 13.7 kg (30.1 lb), and the LA112 weighs 21.4 kg (47.2 lb). Use proper precautions
when lifting or moving.
During assembly and disassembly, make sure the loudspeakers are properly, physically supported throughout the entire
process.
While it is possible for one person to lift a LA108 or LA112 loudspeaker, it is important to use proper lifting techniques.
Suggested reading: OSHA Technical Manual on Back Disorders and Injuries.
(http://www.osha.gov/dts/osta/otm/otm_vii/otm_vii_1.html#app_vii:1_2).
1. Keep these instructions.
2. Heed all warnings.
3. Follow all instructions.
4. Do not use this apparatus near water.
5. Clean only with a dry cloth.
6. Install in accordance with the manufacturer's instructions.
7. Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce
heat.

6
8. This apparatus shall not be exposed to dripping or splashing water, and no object filled with liquids such as cups or vases shall be
placed on the apparatus.
9. To reduce the risk of electric shock, the power cord shall be connected to a mains socket with a protective earthing connection.
10. Protect the power cord from being walked on or pinched, particularly at plugs, convenience receptacles, and the point where they
exit from the apparatus.
11 . Only use attachments/accessories specified by the manufacturer.
12. Unplug this apparatus during lightning storms or when unused for long periods of time.
13. Refer all servicing to qualified service personnel. Servicing is required when the apparatus has been damaged in any way, such
as when the power-supply cord or plug is damaged, liquid has been spilled or objects have fallen into the apparatus, and/or the
apparatus has been exposed to rain or moisture, does not operate normally, or has been dropped.
14. The appliance coupler (AC Mains plug) is the AC mains disconnect device and shall remain readily operable after installation.
15. Adhere to all applicable, local codes.
16. Consult a licensed, professional engineer when any doubt or questions arise regarding a physical equipment installation.
17. Suspension of this product should be done by qualified persons following safe rigging practices. Other limitations may apply.
18. Use only the recommended system components and suspension hardware intended for use with this product as directed by this
manual.
Rigging Safety Regulations:
• 2006/42/EC
• EN ISO 12100-1: 2004
• EN1991-1 / EN1993-1-1 / EN1993-1-8 / EN1999-1-1
• DGUV Vorschrift 17/18
• ANSI E1.8-2018
General Rules for Suspension
• Consult a professional mechanical or structural engineer, licensed in the jurisdiction of the sound system installation, to review, verify,
and approve all attachments to the building or structure.
• Employ the services of a certified, professional rigger for hoisting, positioning, and attaching the equipment to the supporting
structure.
• Correct use of all suspension hardware and components is imperative in sound system suspension and deployment.
• Always calculate suspended loads before lifting to ensure suspension components and hardware are used within their respective
load limits.
• Consult local codes and regulations to fully understand the requirements for suspended loads in the venue in which equipment will
be suspended.
• Use only dedicated QSC LA108-AF and/or QSC LA112-AF array frames or the QSC LA-KIT-I installation kit for suspending a
loudspeaker array. Further details can be found below.
• Be absolutely certain of the integrity of any structural member intended to support suspended loads. Hidden structural members can
have hidden structural weakness.
• Never assume anything! Owner or third-party supplied suspension attachment points may not be adequate for suspending the
loads.
• Before lifting, always inspect all components (enclosures, suspension brackets, pins, frames, bolts, nuts, slings, shackles, etc.) for
cracks, wear, deformation, corrosion, missing, loose, or damaged parts that could reduce the strength of the assembly. Discard any
worn, defective, or suspect parts and replace them with new, appropriately load-rated parts.

7
Shock Loading
When a load is moved or stopped, its static weight is magnified. Sudden movements can magnify the static weight several times. This is
called "shock loading."
The effects of shock loading can be instantaneous, or it can remain undetected. Proper preparation for shock loading requires careful
planning and knowledge of equipment, suspension, and lifting practices. Shock loading is most often the result of lifting and installation,
but natural forces (winds, earthquakes, etc.) can create shock loads several times the static load.
Shock loading poses a danger to equipment and workers. Because of this, structures and suspension equipment must be capable of
supporting several times the weight of the suspended equipment.
Maximum Suspended Load
The following table provides Working Load Limits (WLL) at varying Safety Factors (7:1, 10:1, or 12:1) for the LA108 and LA112 active
line array loudspeakers and companion rigging accessories.
The data presented below is based upon the listed component weights. The tabulated Working Load Limits represent static loads only.
Dynamic and shock-load conditions are determined by unknown, installation-specific factors. The choice of which Safety Factor to
follow will depend upon the jurisdiction, venue of installation, and conditions of suspension.
Refer to a Licensed Structural Engineer for clarification before proceeding with suspension.
Working Load Limits
Model Individual
Component Weight
7:1 Safety Factor 10:1 Safety Factor 12:1 Safety Factor
LA108 13.7 kg / 30.1 lb 241.3 kg / 532 lb 169.2 kg / 373 lb 140.6 kg / 310 lb
LA108 M10 Pullback Point Built into rear of product 92.1 kg / 203 lb 64.4 kg / 142 lb 53.5 kg / 118 lb
LA112 21.4 kg / 47.2 lb 235.4 kg / 519 lb 178.4 kg / 378 lb 149.6 kg / 330 lb
LA112 M10 Pullback Point Built into rear of product 80.3 kg / 177 lb 56.2 kg / 124 lb 46.7 kg / 103 lb
LA108-AF 10.7 kg / 23.7 lb 234.9 kg / 518 lb 164.6 kg / 363 lb 126.1 kg / 278 lb
LA112-AF 11.5 kg / 25.4 lb 235.8 kg / 520 lb 165.1 kg / 364 lb 137.4 kg / 303 lb
LA-KIT-I* 4 LA108 3 LA112
* Included bridled angle to be 90° or less.
FCC Statements
LA108 Loudspeaker
NOTE: The LA108 active line array loudspeaker has been tested and found to comply with the limits for a Class B digital
device, pursuant to Part 15 of the FCC Rules.
These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment
generates, uses, and can radiate radio frequency energy. If not installed and used in accordance with the instructions, it may cause
harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation.
If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off
and on, the user is encouraged to try to correct the interference by one or more of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.

8
LA112 Loudspeaker
NOTE: The LA112 active line array loudspeaker has been tested and found to comply with the limits for a Class A digital
device, pursuant to part 15 of the FCC Rules.
These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a
commercial environment. This equipment generates, uses, and can radiate radio frequency energy. If not installed and used in
accordance with the instruction manual, it may cause harmful interference to radio communications. Operation of this equipment in
a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his own
expense.
Warranty
For a copy of the QSC Limited Warranty, visit the QSC website at www.qsc.com.
NOTE: Read and follow these instructions carefully. If the loudspeakers are not suspended properly, they could fall,
causing personal injury and damage to the equipment. Please refer to the Flown Deployment chapter of the User Manual
for rules on suspension.

9
Introduction
L Class represents the next generation of advanced, intelligent, active loudspeakers for applications ranging from simple, portable,
plug-and-play setups, to demanding, networked, high-tech AV productions and fixed installations.
The LA108 and LA112 are active line array loudspeakers featuring a brilliant combination of leading-edge innovation, refined
engineering, and unparalleled ease of use in easy-to-deploy packages.
Key Features and Technologies
• Purpose-designed, lightweight neodymium transducers deliver high, undistorted SPL (134 dB / 136 dB peak).
• Energy efficient Class D amplifier modules (1300 W / 2400 W peak power) with Power Factor Correction and extremely low AC
consumption.
• Innovative QSC LEAF™(Length-Equalized Acoustic Flare) waveguide provides defined, uniform coverage and exceptional throw.
• Acoustic Linear Phase (ALP) design provides complementary coherence between QSC loudspeakers deployed in the same audio
system delivering a uniform listening experience across the entire venue.
• Intuitive, single operator QSC RapidDeploy™rigging technology with short, medium, and long-throw options guarantees fast
deployment without tools or additional hardware.
• Onboard QSC AWARE™(Automatic Wireless Array Recognition) system intelligence communicates essential setup information to the
user via any loudspeaker’s Rear User Interface (RUI) or QSC System Navigator™App.
• Ar-Q™(Array Equalization) processing automatically makes the appropriate equalization adjustments based on the total splay angle
of the array, total number of boxes in the array, and the location of each loudspeaker in the array.
• QSC SysNav™(System Navigator) App allows the user to easily design, configure, control, monitor and apply signal processing to
individual loudspeakers, full arrays, or groupings of both.
• Network solution includes digital audio-over-IP (Dante®) for interoperability with other audio equipment and seamless control and
monitoring integration into the Q-SYS Ecosystem via Q-SYS Inventory Extensions.
• Flown, ground-stacked over subwoofer(s), loudspeaker stand/pole mounted, or horizontal ground deployment options.
• Industry-best global 6-Year Extended Warranty with product registration.
What’s in the Box
(1) LA108/LA112 active line
array loudspeaker unit
(1) AC power cord, with
PowerCON®TRUE1
(3 m / 10 ft) connectors
(1) Quick Start Guide (1) Safety Sheet
TD-001655-00

10
LA108 Features
—Figure1—
Left Side
Rear
Right SideFront
Bottom
7
9
10
6
5
3
24
8
1
1. ABS enclosure
2. Steel grille
3. Front power LED
4. Handles
5. Rear panel with amplifier module, connectors and rear user interface
6. M10 pull back point
7. Dual-angle, 35 mm pole socket (0° or -7.5°)
8. Side rigging panel
9. Slip-resistant feet
10. IR sensor windows

11
LA112 Features
—Figure2—
Left Side
Rear
Right SideFront
Bottom
7
9
10
6
5
3
2
4
8
1
1. ABS enclosure
2. Steel grille
3. Front power LED
4. Handles
5. Rear panel with amplifier module, connectors and rear user interface
6. M10 pull back point
7. Dual-angle, 35 mm pole socket (0° or -7.5°)
8. Side rigging panel
9. Slip-resistant feet
10. IR sensor windows

12
LA108 and LA112 Deployment Options
Ground Deployment (LA108 options shown)
For Pole Mounted
on a Tripod Stand
see page 16.
For Front Fill
(Stage-Lip)
see page 27.
For Pole Mounted
Over a Subwoofer(s)
see page 18.
For Ground Stack
see page 28.
For Stacking over a
Subwoofer(s) see
page 23.
For Horizontal Array
see page31.
Flown Deployment (LA108 options shown)
For Flown
Deployment with
an Array Frame
see page 34.
For Pick-Point
Deployment
see page 37.

13
QSC RapidDeploy
™
Rigging System
Loudspeaker Attachment Points
1. Front Strikes attach to Front Hooks of the loudspeaker or ground stack above it.
2. Front Hooks attach to Front Strikes of the loudspeaker or ground stack adapter below it.
3. Rear Hooks attach loudspeaker at the rear. They are the locking points once two or more enclosures are arrayed together or
ground stacked.
4. The Locking Lever has three positions:
• Up: Release loudspeaker from the array
• Middle: Prepare loudspeaker to be secured
• Down: Lock attached loudspeaker in place
Loudspeaker Angle Controls
5. The Angle Lever Reset will release a depressed Angle Lever without adjusting the Angle Bar.
6. The Angle Lever prepares the Angle Bar (7) to move to the next available angle. The Angle Lever must return to the full outward
position after angle adjustment. An internal pin locks the Angle Bar when the lever is in the full outward position. If necessary, move
the Angle Bar, and/or push the Angle Lever Reset (5) to set the Angle Bar position.
7. The Angle Bar Lift offers manual lifting of the Angle Bar and visual representation of the splay angle setting
(Up: 1.5°, Middle: 6°, Down: 12°). Note that the Angle Bar is raised in the LA108 and lowered in the LA112 in the images above.
—Figure3—
1
23 4 6 75
LA108
—Figure4—
1
2
3 4 5 6 7
LA112

14
Understanding Splay Angles
QSC RapidDeploy™features a unique Angle Bar with an internal pin mechanism that provides three selectable splay angle adjustments.
These adjustments allow the user to create custom array shapes based on the venue size and application. These three splay angles are:
• 1.5 degrees - This smaller splay angle setting provides
maximum high frequency coupling between adjacent
boxes, delivering the greatest throw:
◦In a 2-box array this smaller splay angle setting
is ideally suited for large venues or temporary
outdoor applications.
◦In a taller 3-6 box array, this smaller splay angle setting should always be used at the top of the array, which is typically aimed
towards the rear-most section of the audience.
• 6 degrees - This medium splay angle setting provides less high frequency
coupling between adjacent boxes, delivering a moderate throw:
◦In a 2-box array this medium splay angle setting is ideally suited for
mid-sized venues.
◦In a taller 3-6 box array, this medium splay angle setting acts as a
coverage transition and should always be in the center of the array,
which is typically aimed towards the middle section of the audience.
• 12 degrees - This larger splay angle setting provides minimal high frequency coupling
between adjacent boxes, delivering a reduced throw:
◦In a 2 box array this large splay angle setting is ideally suited for small venues or clubs.
◦In a taller 3-6 box array, this large splay angle setting should be used at the very bottom
of the array, which is typically aimed towards the front-most section of the audience.
Progressive Splay Angle Rule
A larger splay angle value can NOT be used above a
smaller splay angle value, as this will result in an unsupported
loudspeaker array that cannot be optimized. The splay angle
values must either match or progressively increase in size from
the top of the array to the bottom. Here is an example of a
supported array versus an unsupported array:
NOTE: Although it is technically possible
to deploy and use the array using any splay
angle combination, which does not follow the
Progressive Splay Angle Rule, QSC does not
recommend those deployments.
In such cases, the Ar-Q™Array Equalization and
individual loudspeaker EQ can be manually set to
taste. In that process, QSC recommends setting all
line array loudspeakers to a single loudspeaker
voicing because using multiple array equalization
settings may cause undesired acoustic results.
—Figure5—
—Figure6—
—Figure7—
—Figure8—
1.5°
1.5°
6° 6°
12°
12°

15
How to Manually Total Array Angles
When hung in an array, loudspeakers require specific EQs to ensure the array functions properly as a single sound source. The total
splay angle of the array is used in part to create the filter set to make it acoustically accurate. When the array is optimized, the Ar-Q™
Array Equalization DSP relays the total splay angle of the array through infrared communication between the loudspeakers.
In the unlikely event that the infrared stops communicating on one loudspeaker, or when using a deployment that is unsupported
by the Ar-Q™optimization (for example, an array of seven or more loudspeakers), line array voicings can be set manually from the
loudspeaker’s Rear User Interface to achieve optimum performance.
To do this, users must calculate the total angle splay BETWEEN loudspeakers in the deployed array and enter that calculation into the
DSP to get the correct loudspeaker EQ settings.
NOTE: Do not count the angle between the Array Frame or the Sub Stack Adapter.
NOTE: See the section for “Navigating the Rear User Interface” to access AR-Q™settings.
Example 1: If an array consists of three (3) loudspeakers deployed with a splay angle of 1.5° between the top and the middle
loudspeaker, and 6° between the middle and the bottom loudspeaker, then the total splay angle is 1.5 + 6, which is 7.5 (See graphic
below).
Example 2: If an array consists of six (6) loudspeakers, deployed with a splay angle of 1.5° from the first to the second loudspeaker,
1.5° from the second to the third loudspeaker, 6° from the third to the fourth loudspeaker, 6° from the fourth to the fifth loudspeaker,
and 12° from the fifth to the sixth loudspeaker, then the total splay angle is 1.5 + 1.5 + 6 + 6 + 12, which is 27 (See graphic below).
—Figure9—
1.5°1.5°1.5°
6°6°6°
1.5°1.5°1.5°
1.5°1.5°1.5°
6°6°6°
6°6°6°
12°12°12°
= 27
°
= 27
°
= 27
°
= 7.5°= 7.5°= 7.5°

16
Ground Deployment
Pole Mounted on a Tripod Stand
Both LA108/LA112 active line array loudspeakers feature dual 35 mm pole sockets to accommodate either 0° or -7.5° downward tilt
of the enclosure to optimize audience coverage wherever deployed.
WARNING!: Due to the large selection of various types of tripod stands available in the market, QSC cannot
recommend a maximum deployment height. Assessment of the safety of each individual deployment is left to the user.
However, any tripod stands used must be properly rated for the deployment.
WARNING!: When deploying loudspeakers on poles, additional attention should be given to account for environmental
conditions such as level surfaces, level materials, vibrations, wind, etc, to deploy the loudspeakers in a stable and safe
manner. Use additional measures to secure the loudspeaker pole (not included) when necessary.
LA108 Loudspeaker
Up to three (3) LA108 loudspeakers may be mounted on a 45 kg (100 lb)
ratedtripod loudspeaker stand.
LA112 Loudspeaker
Up to two (2) LA112 loudspeakers may be mounted on a 45 kg (100 lb)
ratedtripod loudspeaker stand.
Pole Mounting a Loudspeaker to a Tripod
To deploy a pole mount with a tilt of 0° or -7.5°, mount the loudspeaker on a 45 kg
(100 lb) rated tripod loudspeaker stand using the 35 mm pole socket labeled 0° or
-7.5° on the bottom of the loudspeaker.
—Figure10—
LA108
LA108
LA108
LA112
LA112
—Figure11—
Pole Sockets

17
Stacking an Array on a Tripod Pole Mount
1. After securing the first loudspeaker to the pole, set the Locking Levers on both sides of the new loudspeaker to the middle (ADD+)
position.
2. Hook both Front Strikes of the new loudspeaker onto the Front Hooks of the loudspeaker mounted to the pole.
3. Lower the back side of the loudspeaker until the new loudspeaker connects with the loudspeaker mounted to the pole, making a
click sound.
4. Push Locking Levers down (LOCK) to secure the new loudspeaker on both sides.
5. Repeat steps 1-4, until array is complete.
—Figure12—
Splay Angle Adjustment on a Tripod Mount
Along with the 0° and -7.5° angle options on a pole mount, splay angle of individual loudspeakers can be adjusted further
to1.5°,6°, and 12°.
0°
7.5°
7
.5°
12°
1.5°
6°
—Figure13—
NOTE: See the section on “Understanding Splay Angles” for further details.

18
Decreasing Angle
1. Push Angle Lever on both sides all the way in, until they make
a click sound and stay depressed.
2. Lift loudspeaker up into the next angle position, until it makes a
click sound.
Increasing Angle
1. Push Angle Lever on both sides all the way in, until they make
a click sound and stay depressed.
2. Slightly lift loudspeaker weight to release internal pin.
3. Lower loudspeaker into the next angle position, until it makes a
click sound.
Pole Mounted Over a Subwoofer(s)
LA108 Loudspeaker
Three (3) LA108 loudspeakers can be safely pole-mounted using a QSC threaded subwoofer pole over:
a. one (1) LS118/KS118 subwoofer when the subwoofer is upright, or
b. two (2) LS118/KS212C when the subwoofers are rotated on their side.
In the above configurations, the subwoofer pole should be no longer than 66 cm (26 inches). The QSC SP-26 accessory (sold
separately) is suitable for this task.
If two (2) LA108 loudspeakers are pole-mounted using a QSC threaded subwoofer pole (QSC SP-36 accessory sold separately), then
the subwoofer pole length can be safely increased to 91 cm (36 inches) in the configurations in on the next page.
WARNING!: Longer pole lengths should not be used, unless the subwoofer is securely attached to the ground with
additional straps or hardware (not included) to prevent a tipping hazard.
1.5°
6°
—Figure14—
1.5°
6°
—Figure15—

19
—Figure16—
SP36
SP36
SP26
SP26
SP26
NOTE: The above graphic illustrates the maximum safe deployment of each configuration given optimal environmental
factors.
WARNING!: Please take additional care to secure or stabilize your equipment in
case of uneven ground, vibrating surfaces, winds, or any other scenario that could
create a tipping hazard. (See —Figure17—)
—Figure17—

20
LA112 Loudspeaker
Two (2) LA112 loudspeakers can be safely pole-mounted using a QSC threaded subwoofer pole over:
a. one (1) LS118/KS118 subwoofer when the subwoofer is upright, or
b. two (2) LS118/KS212C when the subwoofers are rotated on their side.
In the above configurations, the subwoofer pole should be no longer than 66 cm (26 inches). The QSC SP-26 accessory (sold
separately) is suitable for this task.
If one (1) LA112 loudspeaker is pole-mounted using a QSC threaded subwoofer pole, then the subwoofer pole (QSC SP-36 accessory
sold separately) length can be safely increased to 91 cm (36 inches) in the configurations shown below.
WARNING!: Longer pole lengths should not be used unless the subwoofer is securely attached to the ground with
additional straps or hardware to prevent tipping hazard.
—Figure18—
SP36
SP36
SP26
SP26
SP26
NOTE: The above graphic illustrates the maximum safe deployment of each configuration given optimal environmental
factors.
WARNING!: Please take additional care to secure or stabilize your equipment in
case of uneven ground, vibrating surfaces, winds, or any other scenario that could
create a tipping hazard. (See —Figure19—)
—Figure19—