L-Acoustics 8XT User manual

8XT
8XT8XT
8XT coaxial enclosure
coaxial enclosurecoaxial enclosure
coaxial enclosure
8XT
8XT8XT
8XT enceinte
enceinteenceinte
enceinte coaxiale
coaxialecoaxiale
coaxiale
VERSION
VERSION VERSION
VERSION 1.
1.1.
1.4
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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
®
8XT Coaxial Enclosure, designated in this section
as ‘‘the pro uct’’.
1.1 Symbol escription
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. Rea this manual
2. Hee all safety warnings
3. Follow all instructions
4. The user shoul never incorporate equipment or accessories not approve by L-ACOUSTICS
®
5. Soun 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.
!
WARN
ING
!
IMPORTANT
!
CAUTION
!
WARNING
!
CAUTION

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7. Water an 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 an 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Any part showing any sign of defect must immediately be put aside and withdrawn from use to be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.
Con itions which require imme iate 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 eclaration 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, 8XT
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 8XT COAXIAL ENCLOSURE 9
6 INSTALLATION 10
6.1 Flying or stacking the 8XT ..................................................................................................................................... 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 8XT to the LA4 / LA4X ................................................................................................ 13
7.2.3 [8XT_FR], [8XT_FI], and [8XT_MO] presets ....................................................................................... 13
7.3 “HIGH-PASS” mode .............................................................................................................................................. 14
7.3.1 Description ............................................................................................................................................ 14
7.3.2 Connecting the 8XT to the LA4 / LA4X ................................................................................................ 14
7.3.3 [8XT_FR_100], [8XT_FI_100], and [8XT_MO_100] presets ............................................................... 14
7.4 “LOW-EXTENSION’’ mode ................................................................................................................................. 15
7.4.1 Description ............................................................................................................................................ 15
7.4.2 Connecting the 8XT and SB18 to the LA4 / LA4X ................................................................................ 15
7.4.3 Presets ................................................................................................................................................... 16
[8XT_FR_100], [8XT_FI_100], and [8XT_MO_100] .......................................................................................... 16
[SB18_100] ........................................................................................................................................................... 16
[SB18_100_C] ....................................................................................................................................................... 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
®
8XT Coaxial Enclosure.
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 techniques an stan ar s, L-ACOUSTICS
®
reserves the right to
change the specifications of the pro uct an the content of this manual without prior notice. Please check
the L-ACOUSTICS
®
web site at www.l-acoustics.com on a regular basis for latest up ates.
Should 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
®
8XT enclosure is the most compact model within the XT Coaxial Range and operates over
the 65 Hz to 20 kHz frequency bandwidth. This 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 controllers
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 and 12XT enclosures to the LA4 / LA4X
amplified controller. 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 amaging the lou speaker components.
The 8XT and 12XT are driven and powered by the L-ACOUSTICS
®
LA4 / LA4X amplified controller and the 115XT
HiQ by the 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.
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.
!
IMPORTANT
!
CAUTION

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Detailed description on using the LA4, LA4X 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.
12XT 115XT HIQ 8XT
ETR8
-
2
ETR12-2 ETR15
XTLIFTBAR
SB18
SOUNDVISION
LA NETWORK MANAGER

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Figure 1: XT range components (part 1)
Figure 2: XT range components (part 2)
DO25
DO10
DO.7
DOFILL
-
LA8
+
LA4
LA-RAK with 3 LA8
SP25
SP10
SP.7
LA4X

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The L-ACOUSTICS
®
8XT enclosure contains a 1.5’’ diaphragm compression driver coa ially loaded (for HF
directivity control) by an 8’’ low frequency transducer mounted in a bass-refle tuned enclosure. The internal passive
crossover network uses proprietary third order filters. The linearization and protection of the transducers is defined by
the drive parameters contained in the LA4 / LA4X amplified controller. The nominal impedance of the 8XT enclosure is
8 ohms.
The coa ial transducer arrangement produces a 100° a i-symmetric directivity output along with a smooth tonal
response free of secondary lobes over the entire frequency range.
The wedge-shaped cabinet design makes the 8XT perfectly suited to all stacked sound reinforcement applications. The
cabinet can also be flown as well as pole, wall, or ceiling-mounted.
The 8XT cabinet is made of high grade Baltic birch plywood with remarkable mechanical and acoustical properties for
improved long term durability.
Figure 3: The 8XT enclosure
4 inserts with screws
Grill
Pole mount socket
We ge-shape cabinetry
Safety eyebolt insert