L-Acoustics 115XT HiQ User manual

1
11
115
1515
15XT
XTXT
XT HiQ
HiQHiQ
HiQ coaxial
coaxial coaxial
coaxial s
ss
stage monitor
tage monitortage monitor
tage monitor
1
11
115
1515
15XT
XTXT
XT HiQ
HiQHiQ
HiQ retour de scène coaxial
retour de scène coaxialretour de scène coaxial
retour de scène coaxial
VERSION 1.
VERSION 1.VERSION 1.
VERSION 1.
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USER MANUAL
MANUEL D’UTILISATION
FR
EN

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1SAFETY WAR I GS
SAFETY WAR I GSSAFETY WAR I GS
SAFETY WAR I GS
All information hereafter detailed applies for the L-ACOUSTICS
®
115XT HiQ Coaxial Stage Monitor, designated
in this section as ‘‘t e product’’.
1.1 Symbol description
Throughout this manual the potential risks are indicated by the following symbols:
The WARNING symbol indicates a potential risk of physical harm to the user or people within close
pro imity to the product.
In addition, the product may also be damaged.
The CAUTION symbol notifies the user about information to prevent possible product damage.
The IMPORTANT symbol is a notification of an important recommendation of use.
1.2 Important safety instructions
1. Read t is manual
2. Heed all safety warnings
3. Follow all instructions
4. T e user s ould never incorporate equipment or accessories not approved by L-ACOUSTICS
®
5. Sound Levels
Sound systems are capable of producing high Sound Pressure Levels which can be dangerous and
potentially cause hearing damage especially when e posed to them over a long period of time.
Do not stay within close pro imity of the loudspeakers when operating.
6. Heat
Do not operate the product near any heat source, such as radiators or other devices.
!
WARNING
!
IMPORTANT
!
CAUTION
!
WARNING
!
CAUTION

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7. Water and moisture
Even if the product is weather-resistant, it can not be e posed to moisture (rain, sea spray, shower,
steam) for a long period of time, nor put in direct contact or partially immersed in water.
This would cause irreversible damage to e posed components.
8.
System Parts and Rigging inspection
All system components must be inspected before use, in order to detect any possible defects.
Please refer to the “Care and Maintenance” section of this manual as well as any other manuals
pertaining to the system for a detailed description of the inspection procedure.
Any part showing any sign of defect must immediately be put aside and withdrawn for use to be
inspected by qualified service personnel.
9. Mounting instructions
Do not place the product on an unstable cart, stand, tripod, bracket, or table.
The product may fall and be seriously damaged, and may cause serious human injury.
Any mounting of the product should follow the manufacturer’s instructions given in this manual,
and should use a mounting accessory recommended by the manufacturer.
10.
Conditions w ic require immediate service
Servicing is required when the product has been damaged in any way such as:
•
••
•The product has been e posed to rain or moisture,
•The product was dropped or the enclosure is damaged,
•The product does not operate normally.
11. Manual
Keep this manual in a safe place during the product lifetime. This manual forms an integral part of the
product. Reselling of the product is only possible if the user manual is available. Any changes made to
the product have to be documented in writing and passed on to the buyer in the event of resale.
!
IMPORTANT
!
WARNING
!
WARNING
!
CAUTION
!
CAUTION

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1.3 EC declaration of conformity
L-ACOUSTICS
®
13 rue Levacher Cintrat
Parc de la Fontaine de Jouvence
91462 Marcoussis Cede
France
States that the following product:
Loudspeaker enclosure, 115XT HiQ
Is in conformity with the provisions of:
Machinery Directive 2006/42/EC
Low Voltage Directive 2006/95/EC
Applied rules and standards:
EN ISO 12100-1: 2004 (Mechanical Safety)
EN60065 (Electrical Safety)
Established at Marcoussis, France
November 9
th
, 2009
Christophe Pignon

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2CO TE TS
CO TE TSCO TE TS
CO TE TS
1 SAFETY WARNINGS 1
1.1 Symbol description .................................................................................................................................................. 1
1.2 Important safety instructions ................................................................................................................................... 1
1.3 EC declaration of conformity .................................................................................................................................. 3
2 CONTENTS 4
3 INTRODUCTION 5
3.1 Welcome to L-ACOUSTICS
®
.................................................................................................................................. 5
3.2 Unpacking ................................................................................................................................................................ 5
4 XT COAXIAL RANGE 6
5 115XT HiQ COAXIAL STAGE MONITOR 9
6 INSTALLATION 10
6.1 Stacking or flying the 115XT HiQ ......................................................................................................................... 10
6.2 Connecting speakers ............................................................................................................................................. 10
7 OPERATION 12
7.1 System configuration ............................................................................................................................................. 12
7.2 “FULL RANGE” mode .......................................................................................................................................... 13
7.2.1 Description ............................................................................................................................................ 13
7.2.2 Connecting the 115XT HiQ to the LA8 ...................................................... Erreur ! Signet non défini.
7.2.3 [HIQ_FR], [HIQ _FI], and [HIQ _MO] presets ..................................................................................... 14
7.3 “HIGH-PASS” mode .............................................................................................................................................. 15
7.3.1 Description ............................................................................................................................................ 15
7.3.2 Connecting the 115XT HiQ to the LA8 ................................................................................................ 15
7.3.3 [HIQ_FR_100], [HIQ_FI_100], and [HIQ_MO_100] presets................................................................ 16
8 CARE AND MAINTENANCE 17
8.1 Maintenance information ....................................................................................................................................... 17
8.2 Testing procedure ................................................................................................................................................. 17
8.2.1 Check of transducer and enclosure acoustic behavior .......................................................................... 17
8.2.2 Check of mechanical assembly and rigging parts ................................................................................... 17
8.2.3 Check of e ternal aspect ....................................................................................................................... 17
8.3 Transducer service ................................................................................................................................................ 18
8.3.1 LF loudspeaker ....................................................................................................................................... 18
8.3.2 HF driver or diaphragm ......................................................................................................................... 18
8.4 Spare parts and recommended tools ..................................................................................................................... 19
9 SPECIFICATIONS 20

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3I TRODUCTIO
I TRODUCTIOI TRODUCTIO
I TRODUCTIO
3.1 Welcome to L-ACOUSTICS
®
Thank you for purchasing the L-ACOUSTICS
®
115XT HiQ Coaxial Stage Monitor.
This manual contains essential information on installing and operating the product correctly and safely. It is necessary to
read this manual carefully in order to become familiar with these procedures.
As part of a continuous evolution of tec niques and standards, L-ACOUSTICS
®
reserves t e rig t to
c ange t e specifications of t e product and t e content of t is manual wit out prior notice. Please c eck
t e L-ACOUSTICS
®
web site at www.l-acoustics.com on a regular basis for latest update.
If the product requires repair or if information about the warranty is needed, please contact an approved
L-ACOUSTICS
®
distributor. The address of the nearest distributor is available on the L-ACOUSTICS
®
web site.
3.2 Unpacking
Carefully open the shipping carton and check the product for any noticeable damage. Each L-ACOUSTICS
®
product is
tested and inspected before leaving the factory and should arrive in perfect condition.
If found to be damaged, notify the shipping company or the distributor immediately. Only the consignee may initiate a
claim with the carrier for damage incurred during shipping. Be sure to save the carton and packing materials for the
carrier's inspection.

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4XT COAXIAL RA GE
XT COAXIAL RA GEXT COAXIAL RA GE
XT COAXIAL RA GE
The L-ACOUSTICS
®
115XT HiQ stage monitor is the high end reference within the L-ACOUSTICS
®
XT
Coaxial Range and operates over the 50 Hz to 20 kHz frequency bandwidth. The system response can be e tended
down to 32 Hz with the addition of the L-ACOUSTICS
®
SB18 subwoofer.
The system approach developed by L-ACOUSTICS
®
for the XT range consists of the elements needed to fully take
advantage of the possible configurations and optimize the system. The main components of the system are (see also
Figure 1and Figure 2):
8XT  Passive compact coa ial enclosure
12XT  Active/passive multipurpose coa ial enclosure
115XT HiQ  Active coa ial stage monitor
ETR8-2  Mounting accessory for the 8XT enclosure
ETR12-2  Mounting accessory for the 12XT enclosure
ETR15  Mounting accessory for the 115XT HiQ enclosure
XTLIFTBAR  Rigging accessory for the 12XT and 115XT HiQ enclosures
SB18  Subwoofer enclosure
LA4 / LA4X  Amplified controller
LA-RAK  Touring rack containing three LA8 amplified controllers
LA NETWORK MANAGER  Remote control software
SOUNDVISION  Acoustical and mechanical modeling software
SB18 / SB18i / SB18m
In this document, the SB18 term and illustration will refer equally to SB18, SB18i or SB18m. These
products are different versions of the same subwoofer and share the same operating modes, presets and
recommended configurations.
The XT range components are compatible with standard L-ACOUSTICS
®
accessories. These accessories include the
L-ACOUSTICS
®
SP.7, SP10, and SP25 loudspeaker cables with respective lengths of 0.7 m/2 ft,
10 m/30 ft, and 25 m/80 ft. These cables allow connection of the 8XT, 12XT and 115XT enclosures to the LA4 /LA4X
amplified controllers. Each cable is a 4-conductor cable with 4 mm
2
conductor cross-section (13 SWG, 11 AWG) and
features
4-point Speakon
®
connectors.
The L-ACOUSTICS
®
DOFILL-LA8 cable allows connection of the 115XT HiQ enclosure to the LA8 amplified
controller. This cable features 8-point PA-COM
®
and 4-point Speakon
®
connectors and must be e tended using the
L-ACOUSTICS
®
DO.7, DO10, or DO25 cables with respective lengths of 0.7 m/2 ft, 10 m/30 ft, and 25 m/80 ft.
Each DO cable is an 8-conductor cable with 4 mm
2
conductor cross-section (13 SWG, 11 AWG) and features
8-point PA-COM
®
connectors. Note: The PA-COM
®
standard is fully compatible with the CA-COM
®
standard.
ALWAYS connect the new DOFILL-LA8 cable on the LA8 amplified controller for active 2-way
applications, as using the old DOFILL cable may result in damaging t e loudspeaker components.
The 8XT and 12XT are driven and powered by the L-ACOUSTICS
®
LA4 or LA4X amplified controller and the
115XT HiQ by the LA4X or LA8. These controllers ensure intelligent protection, filtering, and equalization of the
enclosures. Four channels of amplification are provided along with the OEM factory preset libraries, ensuring the
optimization and performance of the systems within the limits of the recommended configurations.
The L-ACOUSTICS
®
LA-RAK touring rack offers an advanced solution for all L-ACOUSTICS
®
systems covering signal
and power distribution in a comprehensive plug and play touring package. The LA-RAK was created as a universal
platform designed to facilitate cross-rental and to ensure compatibility with the L-ACOUSTICS
®
legacy analog cabling
standard.
Each system design configuration should first be modeled and studied using the L-ACOUSTICS
®
SOUNDVISION
software. The software predictions are based on the preset parameters stored in the amplified controllers.
!
IMPORTANT
!
CAUTION

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Up to 253 amplified controllers can be interconnected and monitored through the proprietary L-ACOUSTICS
®
L-NET network using the L-ACOUSTICS
®
LA NETWORK MANAGER software.
Detailed description on using the LA4 and LA8 amplified controllers, SOUNDVISION and LA NETWORK MANAGER
software is beyond the scope of this manual. Please refer to the appropriate documentation, also available on the
L-ACOUSTICS
®
web site at www.l-acoustics.com.
Figure 1: XT range components (part 1)
12XT 115XT HIQ 8XT
ETR8-2 ETR12-2 ETR15
XTLIFTBAR
SB18
SOUNDVISION
LA NETWORK MANAGER

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Figure 2: XT range components (part 2)
DO25
DO10
DO.7
DOFILL
-
LA8
+
LA4
LA-RAK wit 3 LA8
SP25
SP10
SP.7
LA4X

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5115XT Hi
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115XT HiQ COAXIAL STAGE MO ITOR
Q COAXIAL STAGE MO ITORQ COAXIAL STAGE MO ITOR
Q COAXIAL STAGE MO ITOR
The L-ACOUSTICS
®
115XT HiQ contains a 3’’ diaphragm compression driver loaded by a constant directivity
conical waveguide united in a coa ial configuration with a 15’’ low frequency transducer integrated into a compact low
profile bass-refle tuned enclosure.
Managed by the LA4X or LA8 amplified controllers, the 2-way active filtering encompasses advanced crossover
functions, system EQ, HF and LF transducer time-alignment, and protection of the transducers. The linearization and
protection of the transducers is defined by the drive parameters contained in the LA8 or LA4X amplified controller.
The impedance of the 115XT HiQ is 8 ohms for each of the LF and HF sections.
The coa ial transducer and conical waveguide arrangement produces a 50° a i-symmetric directivity output along with a
smooth tonal response free of secondary lobes over the entire frequency range. This arrangement also provides
immunity to feedback.
The wedge-shaped cabinet design makes the 115XT HiQ perfectly suited to all stacked sound reinforcement
applications (in particular, short or long throw monitoring use). The cabinet can also be flown as well as pole, wall, or
ceiling-mounted.
The 115XT HiQ cabinet is made of high grade Baltic birch plywood with remarkable mechanical and acoustical
properties for improved long term durability.
Figure 3: T e 115XT HiQ enclosure
Grill
Pole
-
mount sockets
Wedge
-
s aped cabinetry
Safety eyebolt insert

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6I STALLATIO
I STALLATIOI STALLATIO
I STALLATIO
6.1 Stacking or flying t e 115XT HiQ
The integrated rigging components and the wedge-shaped cabinet design of the 115XT HiQ enclosure (Figure 3) allow
various setups such as:
•
••
•Wall or ceiling-mounting using the L-ACOUSTICS
®
ETR15 mounting accessory.*
•
••
•Flying using the L-ACOUSTICS
®
XTLIFTBAR rigging accessory.*
•
••
•Mounting to a 35 mm/1.4 inch pole stand using the integrated pole socket.
•
••
•Stacking with two fi ed angle settings of 30° and 60° with regard to the vertical.
* A safety eye-bolt accessory can be added using the M8 insert located on the rear face of the 115XT HiQ enclosure.
Note: The “M8” notation refers to the European standard (see applicable e ternal documentation).
Refer to the “XT and P’’ rigging procedures manual to get acquainted with the XT range
specific procedures.
6.2 Connecting speakers
The 115XT HiQ enclosure is driven and powered by the dedicated L-ACOUSTICS
®
LA8 or LA4X amplified
controllers.
Each of the LA8 amp channels 1 and 3 can drive one or two (in parallel) 115XT HiQ enclosures.
Each of the LA4X amp channels 1 and 3 can drive one 115XT HiQ enclosures.
For more details please refer to the “LA4X’’ or “LA8’’ user manual also available on the L-ACOUSTICS
®
web site
at www.l-acoustics.com.
The 115XT HiQ enclosure is equipped with two 4-point Speakon
®
connectors wired in parallel, allowing connection
with a second 115XT HiQ enclosure in parallel using one of the L-ACOUSTICS
®
SP.7, SP10, or SP25 cables.
It is recommended to use the L-ACOUSTICS
®
DOFILL-LA8 cable to connect the 115XT HiQ enclosure to the LA8
amplified controller. This cable must be e tended by one of the L-ACOUSTICS
®
DO.7, DO10, or DO25 cables (see
Figure 2 and Figure 4).
It is recommended to use the L-ACOUSTICS
®
SP.7, SP10, or SP25 cables to connect the 115XT HiQ enclosure to
the LA4 / LA4X amplified controller.
The L-ACOUSTICS
®
wiring convention is as follows:
Speak
on
®
connector labels
Connection
to transducers
1+ LF +
1- LF -
2+ HF +
2- HF -
Figure 4: Connecting two 115XT HiQ in parallel to t e c annel pair 1/2 of an LA8 controller
DO.7,
DO10,
or DO25
DOFILL
-
LA8
SP.7,
SP10,
or SP25
CH(A)
!
WARN
ING
CH(B)

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To ensure both high performance and safety, L-ACOUSTICS
®
recommends the e clusive use of
high-quality, fully insulated speaker cables made of stranded copper wire.
In order to preserve a high damping factor it is desirable to keep loudspeaker cables as short as
possible and with a gauge offering low resistance per unit length.
The following table provides information regarding the recommended length versus wire cross-section. Two cases are
possible depending on the impedance load connected to the amplified controller: 8 Ω for a single 115XT HiQ
enclosure, 4 Ω for two 115XT HiQ enclosures in parallel (LA8 only).
Table 1: Maximum cable lengt versus conductor cross-section for Damping Factor > 20
Cross-section
Lengt for one 115XT HiQ
(8 Ω load)
L
engt for two 115XT HiQ
(4 Ω load)
mm
2
SWG AWG m ft m ft
2.5 15 13 30 100 15 50
4 13 11 50 160 25 80
6 11 9 74 240 37 120
10 9 7 120 390 60 195
According to the calculation in Table 1, one DO25 cable (4 mm², 25 m) can be used to power two 115XT HiQ in
parallel (4 Ω load) with a damping factor still greater than 20.
!
IMPORTANT

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7OPERATIO
OPERATIOOPERATIO
OPERATIO
7.1 System configuration
The choice of a system configuration should be the result of an electro-acoustic study conducted by an e pert (System
Engineer or Audio Consultant). However, this will not be discussed here as sound-design aspects are beyond the scope
of this manual. This study can rely on the simulations modeled in SOUNDVISION software, yielding electro-acoustic
predictions which take into account the enclosures’ manufacturer data and particular situational usage, as well as the
projected environment.
Two operation modes (“FULL RANGE” and “HIGH-PASS”), each one associated with a set of factory presets, will
allow building all the common configurations (C, LR, LCR, distributed…).
The 115XT HiQ enclosures can be used as a standalone system in the “FULL RANGE’’ mode or in combination with
subwoofers in the “HIGH-PASS’’ mode.
For each mode a distinction is drawn between ‘‘FRONT’’, ‘‘FILL’’, and ‘‘MONITOR’’ presets as they respectively
match front-of-house, distributed, and half-space loading applications.
The MONITOR presets have been optimized from the 1.3 to the 2.0 preset library versions.
ALWAYS check that the 115XT HiQ enclosures are connected to correct LA8 output channels
before operating.
Note: The latest version of the preset library can be supplied by an L-ACOUSTICS
®
authorized representative and is
also downloadable on the L-ACOUSTICS
®
web site at www.l-acoustics.com.
!
IMPORTANT
!
IMPORTANT

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7.2 “FULL RANGE” mode
7.2.1 Description
In ‘‘FULL RANGE’’ mode the 115XT HiQ enclosures are used in standalone configurations within their nominal
bandwidth (50 Hz - 20 kHz), for applications not requiring low frequency e tension.
7.2.2 Connecting t e 115XT HiQ to t e LA4 / LA4X and LA8
Connect one 115XT HiQ enclosure to the output channel OUT1 / OUT2 and OUT3 / OUT4 of the LA4 / LA4X and
LA8 controllers.
With an LA8, an additional 115XT HiQ enclosure can be connected in parallel with each first one.
One LA4 / LA4X amplified controller can therefore drive up to two 115XT HiQ enclosures (see Figure 7Erreur !
Source du renvoi introuvable.).
One LA8 amplified controller can therefore drive up to four 115XT HiQ enclosures (see Figure 8Erreur ! Source du
renvoi introuvable.).
Figure 5: Four 115XT HiQ enclosures connected to an LA8 controller
Figure 6: Two 115XT HiQ enclosures connected to an LA4 / LA4X controller
Note: This drawing is only a cabling scheme and does not represent a valid configuration.
OUT 1 / OUT 2
OUT 3
/ OUT 4
IN A
IN B
Note: This drawing is only a cabling scheme and does not represent a valid configuration.
OUT 1 / OUT 2
OUT 3 / OUT 4

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7.2.3 [HIQ_FR], [HIQ _FI], and [HIQ _MO] presets
The [HIQ_FR] ‘‘FRONT’’ preset features LF and HF shelving EQ for standalone FOH applications (without subwoofers).
The [HIQ_FI] ‘‘FILL’’ preset results in a ‘‘flat’’ contour in free field conditions for use in speech reinforcement, classical
music, or close pro imity fill applications.
The [HIQ_MO] ‘‘MONITOR’’ preset results in a ‘‘flat’’ contour in half-space loading conditions for floor monitoring, wall,
or ceiling-mounted applications.
Activate the LOAD PRESET menu from the LA8 amplified controller front panel and then select the desired preset.
Refer to the ‘‘LA8’’, ‘‘LA4’’ or ‘‘LA4X’’ user manual for additional instructions. The preset is also accessible using
the LA NETWORK MANAGER software (refer to the ‘‘LA NETWORK MANAGER’’ user manual). The accessible
parameters in ‘‘FULL RANGE’’ mode are shown in the following chart:
Table 2: Accessible parameters in ‘‘FULL RANGE’’ mode
Loudspeaker
Elements Amplifier outputs
C annels
Default parameters
Routing Gain Delay Polarity Mute
115XT HiQ
OUT 1 PA IN A 0 dB
0 ms
+
ON
115XT HiQ
OUT 2 PA IN A 0 dB
0 ms
+
ON
115XT HiQ
OUT 3 PA IN B 0 dB
0 ms
+
ON
115XT HiQ
OUT 4 PA IN B 0 dB
0 ms
+
ON

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7.3 “HIGH-PASS” mode
7.3.1 Description
In ‘‘HIGH-PASS’’ mode the 115XT HiQ enclosures are 100 Hz high-pass filtered to allow using them along with the
dedicated complimentary SB18 subwoofers. The bandwidth of the system is e tended down to 32 Hz.
The recommended ratio is one 115XT HiQ for one SB18.
7.3.2 Connecting t e 115XT HiQ to t e LA4 / LA4X and LA8
Connect one 115XT HiQ enclosure to the output channel OUT1 / OUT2 and OUT3 / OUT4 of the LA4 / LA4X and
LA8 controllers.
With an LA8, an additional 115XT HiQ enclosure can be connected in parallel with each first one.
One LA4 / LA4X amplified controller can therefore drive up to two 115XT HiQ enclosures (see Figure 7Erreur !
Source du renvoi introuvable.).
One LA8 amplified controller can therefore drive up to four 115XT HiQ enclosures (see Figure 8Erreur ! Source du
renvoi introuvable.).
Figure 7: Four 115XT HiQ enclosures connected to an LA8 controller
Figure 8: Two 115XT HiQ enclosures connected to an LA4X controller
Note: This drawing is only a cabling scheme and does not represent a valid configuration.
OUT 1 / OUT 2
OUT 3 / OUT 4
IN A
IN B
Note: This drawing is only a cabling scheme and does not represent a valid configuration.
OUT 1 / OUT 2
OUT 3
/ OUT 4

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7.3.3 [HIQ_FR_100], [HIQ_FI_100], and [HIQ_MO_100] presets
The [HIQ_FR_100] ‘‘FRONT’’ preset features a HF shelving EQ and a 100 Hz high-pass filter for FOH applications with
subwoofers.
The [HIQ_FI_100] ‘‘FILL’’ preset results in a ‘‘flat’’ contour down to 100 Hz in free field conditions for use in speech
reinforcement, classical music, or close pro imity fill applications.
The [HIQ_MO_100] ‘‘MONITOR’’ preset results in a ‘‘flat’’ contour down to 100 Hz in half-space loading conditions for
floor monitoring, wall, or ceiling-mounted applications.
Activate the LOAD PRESET menu from the LA8 amplified controller front panel and then select the desired preset.
Refer to the ‘‘LA4’’, ‘‘LA4X’’ or ‘‘LA8’’ user manual for additional instructions. The preset is also accessible using
the LA NETWORK MANAGER software (refer to the ‘‘LA NETWORK MANAGER’’ user manual). Accessible
parameters in ‘‘HIGH-PASS’’ mode are shown in the following chart:
Table 3: Accessible parameters in ‘‘HIGH-PASS’’ mode
Loudspeaker
Elements Amplifier outputs
C annels
Default parameters
Routing Gain Delay Polarity Mute
115XT HiQ
OUT 1 PA IN A 0 dB
0 ms
+
ON
115XT HiQ
OUT 2 PA IN A 0 dB
0 ms
+
ON
115XT HiQ
OUT 3 PA IN B 0 dB
0 ms
+
ON
115XT HiQ
OUT 4 PA IN B 0 dB
0 ms
+
ON
Note: The complimentary SB18 subwoofers must be connected to additional LA4 / LA4X or LA8 amplified controllers.
Please refer to the ‘‘SB18’’ user manual.

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8
88
8CARE A D
CARE A D CARE A D
CARE A D MAI TE A CE
MAI TE A CEMAI TE A CE
MAI TE A CE
8.1 Maintenance information
The L-ACOUSTICS
®
115XT HiQ enclosure is a technical product designed for various, intensive indoor and outdoor
sound reinforcement applications. To fulfill such demanding conditions L-ACOUSTICS
®
has designed the 115XT HiQ
with high-grade and reliable components:
•Weather-resistant transducers.
•Baltic birch plywood cabinet.
•Polyester-coated steel grill covered by a non biodegradable “Airnet” fabric.
•O idation-resistant screws and rigging points.
However, in order to ensure product performance and safety, it is essential to frequently inspect the 115XT HiQ
cabinet and its internal components. These checks need to be done on a regular basis depending on the conditions of
system use. The testing procedure consists of three steps as described in section 8.2. If a transducer needs to be
repaired or replaced, apply the corresponding procedure in section 8.3.
8.2 Testing procedure
8.2.1 C eck of transducer and enclosure acoustic be avior
Connect a sweep frequency generator to the active input of the LA8 amplified controller. Apply a sweep from 50 Hz to
20 kHz with a maximum voltage of 0.2 volts (-12 dBu, -14 dBV): the sound should remain pure and free of any
unwanted noise. If not, check the mechanical assemblies and, if necessary, contact an L-ACOUSTICS
®
authorized
representative to repair or replace the damaged components (see also section 8.3).
0.2 volts is a ma imum value that can generate very high sound levels at given frequencies.
Use ear protection to set the sound level before testing.
Whenever a transducer is reconnected, wiring polarity should be checked using a phase checking device. If a transducer
is out of phase, invert the cables connected to its electrical sockets. The connecting procedures are given in section 8.3.
8.2.2 C eck of mec anical assembly and rigging parts
Inspect the general aspect of assembly and check that screws are locked tight (on rigging elements, loudspeaker,
diaphragm, and grill). Check the quality of contact and locking action of the Speakon
®
sockets. Also check the integrity
of rigging elements (no signs of deformation, fissure, or corrosion). If necessary, contact an L-ACOUSTICS
®
authorized
representative to replace the damaged components.
8.2.3 C eck of external aspect
Remove the dust from the grill with a vacuum device. If needed, repaint the cabinet.
If paint is applied, protect mechanical parts.
Do not apply paint to the front grill fabric as it could fill the fabric holes and deteriorate the acoustic
transparency of the material.
!
IMPORTANT
!
WARNING

115XT HiQ
115XT HiQ115XT HiQ
115XT HiQ COAXIAL STAGE MO ITOR
COAXIAL STAGE MO ITORCOAXIAL STAGE MO ITOR
COAXIAL STAGE MO ITOR
user manual
user manualuser manual
user manual
VERSIO 1.4
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8.3 Transducer service
8.3.1 LF loudspeaker
If damaged, the 15” LF loudspeaker should be removed and repaired or replaced as described below. Recone kits are
available. Alternatively, reconing can be performed by L-ACOUSTICS
®
(see section 8.4).
15” loudspeaker removing procedure
1. Put the enclosure on a flat surface and roll both rubber bands back away from the grill.
2. Remove the grill: remove the 6 Tor
®
screws, lift up the grill (hands through the handles). Note: Remember
the logo side before removing.
3. Remove the loudspeaker coa ial assembly: remove the 4 he screws with flat washers and mounting brackets,
lift up the loudspeaker by using a flat screwdriver.
4. Place the loudspeaker coa ial assembly in front of the enclosure with HF waveguide facing the flat surface.
5. Disconnect the four cables (1 red, 1 black, 1 blue, and 1 white) from the transducer terminal posts (push on
the spring-loaded terminal post, slide the cable out, and release the terminal post).
6. Remove both he screws located on the HF heat dissipation plate and remove the HF assembly.
7. Remove the four he screws located at the back of the HF waveguide.
8. Turn the assembly upside down, remove the HF waveguide with four washers, and remove the rubber joint.
15” loudspeaker replacing procedure
1. Place the LF speaker in front of the enclosure with cone facing the user.
2. Place the rubber joint, four washers, and HF waveguide on the LF speaker.
3. Turn the assembly upside down and screw in the four he screws at the back of the HF waveguide (5 N.m/45
in.lb
f
, thread-locker).
4. Install the HF assembly on the LF loudspeaker and screw in both he screws through the HF heat dissipation
plate (5 N.m/45 in.lb
f
, thread-locker).
5. Connect the four cables to the transducer terminal posts (push on the spring-loaded terminal post,
slide the cable in, and release the terminal post): red = LF+ (LF red terminal post), black = LF- (LF
black terminal post), blue = HF+ (HF red terminal post), w ite = HF- (HF black terminal post).
6. Install the loudspeaker assembly in the enclosure and screw in the 4 he screws with flat washers
and mounting brackets: into each he screw insert a flat washer and then a mounting bracket (following t is
sequence) and screw in the assembly to one of the four locations (5 N.m/45 in.lb
f
).
7. Install the grill (with logo in the same orientation as before removing) and screw in the 6 Tor
®
screws
at 10 mm/0.5 inch besides the previous drillings (4 N.m/36 in.lb
f
). Note: pay attention for the fabric to slide
along the inside of the cabinetry.
8. Put in place both rubber bands on the grill.
8.3.2 HF driver or diap ragm
If damaged, the HF diaphragm or the full HF driver should be removed and replaced as described below.
HF driver or diap ragm removing procedure
1. Put the enclosure on a flat surface and roll both rubber bands back away from the grill.
2. Remove the grill: remove the 6 Tor
®
screws, lift up the grill (hands through the handles). Note:
Remember the logo side before removing.
3. Remove the loudspeaker coa ial assembly: remove the 4 he screws with flat washers and mounting
brackets, lift up the loudspeaker by using a flat screwdriver.
4. Place the loudspeaker coa ial assembly in front of the enclosure with HF waveguide facing the flat surface.
5. Disconnect both blue and white cables from the HF driver terminal posts (push on the spring-loaded
terminal post, slide the cable out, and release the terminal post).
6. To only remove the diaphragm: Remove the 4 he screws from the back cover of the driver, pull the cover
out, and pull the diaphragm out from the magnet.
To remove the full HF driver: Remove both he screws from the HF heat dissipation plate and remove the HF
assembly from the LF loudspeaker. Remove both Tor
®
screws from the rear face of the plate and separate
this plate from the driver.

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HF driver or diap ragm replacing procedure
1. To install a full HF driver:
a. Install the new driver on the heat dissipation plate.
b. Screw in both Tor
®
screws on the rear face of the plate (5 N.m/45 in.lb
f
, thread-locker).
c. Install the HF assembly on the LF loudspeaker and screw in both he screws through the HF heat
dissipation plate (5 N.m/45 in.lb
f
with thread-locker).
To install a diaphragm only:
a. Ensure that the voice coil gap on the driver is free from any particles. If necessary, clean out the gap
by using 2-sided tape.
b. Install the new diaphragm in the gap, install the back cover.
c. Screw in the 4 he screws on the back cover (3 N.m/27 in.lb
f
). Note: Note: Balance the torques
between screws at every moment while screwing in so as to properly center the diaphragm.
d. Apply a low level LF sine wave (for e ample: 1 volt at 440 Hz) to ensure that the diaphragm is
properly centered in the gap (the sound should remain pure and free of any unwanted noise). If not,
slightly unscrew, center, screw, and make another test.
2. Connect both cables to both new diaphragm terminal posts: connect the blue cable to t e red terminal
post and the w ite cable to t e black terminal post (push on the spring-loaded terminal post, slide the
cable in, and release the terminal post).
3. Install the loudspeaker assembly in the enclosure and screw in the 4 he screws with flat washers
and mounting brackets: into each he screw insert a flat washer and then a mounting bracket (following t is
sequence) and screw in the assembly to one of the four locations (5 N.m/45 in.lb
f
).
4. Install the grill (with logo in the same orientation as before removing) and screw in the 6 Tor
®
screws
(4 N.m/36 in.lb
f
) at 10 mm/0.5 inch besides the previous drillings. Note: pay attention for the fabric to slide
along the inside of the cabinetry.
5. Put in place both rubber bands on the grill.
8.4 Spare parts and recommended tools
Table 4: Main available spare parts
HP BC32
3’’ driver - 8 Ω
HS BC32
Diaphragm for 3’’ driver - 8 Ω
HP PH152
15’’ coa ial speaker - 8 Ω
HS PH152
15’’ recone kit
HR PH152
15’’ recone kit including factory service
SE GR115HIQ
Complete front grill
Table 5: Recommended tools for service
Torque wrench (N.m or in.lb
f
)
3 mm he bit
4 mm he bit
5 mm he bit
T.20 Tor
®
bit
T.30 Tor
®
bit
4 mm flat screwdriver
Medium-strength thread-locker