JBL VTX Series User manual

VTX A8| User Manual

VTX A8| User Manual
GENERAL INFORMATION
VTX A8 - User Manual
Document Number: 1000337283
Version: C - EN
Distribution Date: December 23, 2020
Copyright © 2020 by HARMAN International; all rights reserved
JBL PROFESSIONAL
8500 Balboa Blvd
Northridge, CA 91329
USA

VTX A8| User Manual
Thank you for purchasing JBL VTX Series products
In more than 75 years of JBL innovations, the VTX Series stands apart as a milestone in the practical application of cre-
ative engineering. VTX products herald the next generation in line array loudspeaker systems: a new era in performance,
system integration and user friendliness. VTX products draw on multiple JBL patents in driver, waveguide, and suspension
technology, as well as custom amplification, DSP, control, and system management designs created in collaboration with
HARMAN Professional sister companies.
VTX loudspeakers marry custom transducer design and in-house manufacture, breakthrough technologies, and a com-
prehensive system approach to deliver a premium experience for all who come into contact with it, from the FOH mixing
engineer to the systems engineer, rigger, road crew, warehouse manager, and, of course, the audience. Designed for
operators of portable and fixed systems alike, the VTX Series features JBL’s legendary sound quality coupled with expert
support and advanced tools that enable optimal specification, configuration, and operation of VTX systems in any venue,
anywhere in the world. The VTX Series delivers a comprehensive solution: the finest sound quality available, plus efficient
and intuitive setup, tuning, networking, and control.

VTX A8| User Manual
TABLE OF CONTENTS
1 - DECLARATION OF CONFORMITY ...........................................................................6
2 - SAFETY .................................................................................................7
2.1 Safety Instructions ....................................................................................7
2.2 General Hardware Information ..........................................................................7
2.3 Attachment to Structures ...............................................................................7
2.4 Important Safety Warning ..............................................................................8
2.5 Are You New to Rigging? ..............................................................................8
2.6 Inspection and Maintenance ............................................................................8
2.7 Symbols ............................................................................................9
3 - SYSTEM COMPONENTS .................................................................................10
4 - COMPATIBLE ACCESSORIES..............................................................................11
4.1 VTX A8 AF - Array Frame ..............................................................................11
4.2 VTX A8 AF EB - Array Frame Extension Bar ...............................................................11
4.3 VTX A8 MF - Mini Frame ..............................................................................11
4.4 VTX A8 SB - Suspension Bar ...........................................................................12
4.5 VTX A8 VT - Vertical Transporter ........................................................................12
4.6 VTX A8 VT CVR - Soft Cover ...........................................................................12
4.7 VTX A8 BP - Base Plate ...............................................................................12
4.8 VTX RC500 - Rotating Clamp. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.9 VTX Delta - Delta Plate................................................................................13
5 - SOFTWARE.............................................................................................14
5.1 Line Array Calculator 3 TM .............................................................................14
5.2 Array Link TM .......................................................................................14
5.3 Performance Manager TM ..............................................................................14
6 - INTRODUCTION .........................................................................................15
6.1 VTX A8 ............................................................................................15
6.2 VTX B18 ...........................................................................................16
7 - CONNECTIONS .........................................................................................17
7.1 A8 Internal Wiring ....................................................................................18
7.2 B18 Internal Wiring...................................................................................18
8 - SYSTEM AMPLIFICATION & WIRING ........................................................................19
8.1 Using A8 With Crown I-Tech 4X3500HD ..................................................................19
8.2 Using A8 With Crown I-Tech HD (2-CH)...................................................................20
8.3 Using A8 and B18 With I-Tech 4X3500HD.................................................................21

VTX A8| User Manual
8.4 Using A8 and B28 With I-Tech 4X3500HD.................................................................22
8.5 Crown V-Rack ......................................................................................22
9 - VTX A8 PRESET LIBRARY.................................................................................23
9.1 VTX A8 Preset Modes and Options ......................................................................23
9.2 VTX B18/B28 Preset Modes and Options .................................................................23
10 - SUBWOOFER OPTIONS .................................................................................24
10.1 SUB / LF Preset Options..............................................................................24
10.2 Time Alignment.....................................................................................25
11 - CONFIGURATION EXAMPLES ............................................................................26
11.1 Small A8 System ...................................................................................26
11.2 Medium A8 System .................................................................................26
11.3 Large A8 System ...................................................................................27
11.4 Large A8 and A12 System ............................................................................27
12 - FREQUENCY RESPONSE ................................................................................28
13 - LINE ARRAY CONTROL PANEL ...........................................................................29
13.1 Accessing LACP....................................................................................29
13.2 Filter 1 - Array Size Compensation .....................................................................30
13.3 Filter 2 - Atmospheric Absorption Compensation ..........................................................30
13.4 Filter 3 - HF Throw Distance Compensation ..............................................................30
13.5 Filters 4 & 5 - User PEQ 1 & 2 .........................................................................30
13.6 Example using LACP ................................................................................31
14 - TESTING THE VTX A8 ...................................................................................32
14.1 Using a DMM (Digital Multi Meter) ......................................................................32
14.2 Testing Individual components ........................................................................33
14.3 Using Performance Manager ..........................................................................34
13.4 Performance Manager Readings .......................................................................34
15 - SPECIFICATIONS .......................................................................................35
16 - ACOUSTIC MEASUREMENTS ............................................................................36
17 - DIMENSIONS ..........................................................................................36
18 - CONTACT INFORMATION ................................................................................37

VTX A8| User Manual
1 - DECLARATION OF CONFORMITY
Frank Lacelle
Compliance Manager - Harman International
BRAND: JBL Professional
FAMILY NAME: VTX A8 loudspeaker and suspension accessories
• VTX A8
• VTX A8 AF
• VTX A8 AF EB
• VTX A8 MF
• VTX A8 SB
• VTX A8 BP
MODEL NAMES:
We, HARMAN International, declare under our sole responsibility that the product, to which this declaration relates, is in conformity
with the following standards:
STANDARD DESCRIPTION TEST AGENCY
2006/42/EC
MACHINERY DIRECTIVE
Applies to machinery and lays down essential
health and safety requirements
ISO12100
Tested at JBL Professional
2014/35/EC
LOW VOLTAGE DIRECTIVE
Applies to loudspeaker and lays down essential
health and safety requirements.
EN60065
Tested at JBL Professional
• VTX RC500
• VTX A8 VT

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VTX A8| User Manual
2 - SAFETY
2.1 SAFETY INSTRUCTIONS
1. Read these instructions.
2. Keep these instructions.
3. Heed all warnings.
4. Follow all instructions.
5. Do not expose the product to direct rain or sea spray.
6. Clean only with a dry cloth.
7. Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus that produce heat.
8. Only use attachments/accessories specified by the manufacturer.
9. Use only with a cart, stand, tripod, bracket, or table specified by the manufacturer or sold with the apparatus. When a cart is used,
use caution when moving the cart/apparatus combination to avoid injury from tip-over.
10. Refer all servicing to qualified service personnel. Servicing is required when the apparatus has been damaged in any way, such as if
liquid has been spilled or objects have fallen into the apparatus, or if the apparatus has been exposed to rain or moisture, does not
operate normally, or has been dropped.
11. Contact JBL Professional for advanced servicing issues.
12. CAUTION - DO NOT PERFORM ANY SERVICING UNLESS YOU ARE QUALIFIED TO DO SO.
13. Prolonged exposure to excessive SPL can cause hearing damage. The loudspeaker is easily capable of generating sound pressure
levels (SPL) sufficient to cause permanent hearing damage to performers, production crew, and audience members. Caution should
be taken to avoid prolonged exposure to SPL in excess of 90 dB.
14. Read the System Rigging Manual before installation and use of the product.
2.2 GENERAL HARDWARE INFORMATION
Any hardware used in an overhead suspension application must be load rated for the intended use. Generally, this type of hardware
is available from rigging supply houses, industrial supply catalogs, and specialized rigging distributors. Local hardware stores do not
usually stock these products. Compliant hardware will be referenced with a working load limit (WLL) and a traceability code.
2.3 ATTACHMENT TO STRUCTURES
A licensed Professional Engineer must approve the placement and method of attachment to the structure prior to the installation of any
overhead object. The following performance standards should be provided to the Professional Engineer for design purposes: Uniform
Building Code as applicable, Municipal Building Code as applicable, and Seismic Code as applicable. The installation of the hardware
and method of attachment must be carried out in the manner specified by the Professional Engineer. Improper installation may result in
damage, injury, or death.

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VTX A8| User Manual
2.5 ARE YOU NEW TO RIGGING?
If you are new to rigging, you should:
• Know the rules for safe rigging.
• Attend a safe rigging seminar.
• Meet and establish a relationship with a licensed mechanical or structural engineer. Get in the habit of asking them questions in-
stead of assuming their answers. Learn from what they tell you.
• Research and understand the codes, practices and requirements of the venues where you intend to operate your sound system.
2.4 IMPORTANT SAFETY WARNING
The information in this section has been assembled from recognized engineering data and is intended for informational purposes only.
None of the information in this section should be used without first obtaining competent advice with respect to applicability to a given
circumstance. None of the information presented herein is intended as a representation or warranty on the part of JBL. Anyone making
use of this information assumes all liability arising from such use.
All information presented herein is based upon materials and practices common to North America and may not directly apply to other
countries because of differing material dimensions, specifications, and/or local regulations. Users in other countries should consult with
appropriate engineering and regulatory authorities for specific guidelines.
Correct use of all included hardware is required for secure system suspension. Careful calculations should always be performed to
ensure that all components are used within their working load limits before the array is suspended. Never exceed the maximum recom-
mended load ratings.
Before suspending any speaker system, always inspect all components (enclosure, rigging frames, pins, eyebolts, track fittings, etc.) for
cracks, deformations, corrosion, or missing/loose/damaged parts that could reduce strength and safety of the array. Do not suspend
the speaker until the proper corrective action has been taken. Use only load-rated hardware when suspending JBL suspendable loud-
speaker models.
2.6 INSPECTION AND MAINTENANCE
Suspension systems are comprised of mechanical devices and, as such, require regular inspection and routine maintenance to ensure
proper functionality. Before suspending or pole mounting any speaker system, always inspect all components (enclosure, suspension
frames or brackets, pins, eyebolts, etc.) for cracks, deformations, corrosion, or missing/loose/damaged parts that could reduce strength
and safety of the array. Do not suspend or pole mount a speaker until the proper corrective action has been taken.
Installed systems should be inspected at least once a year. The inspection must include a visual survey of all corners and load-bearing
surfaces for signs of cracking, water damage, delamination, or any other condition that may decrease the strength of the loudspeaker
enclosure.
Accessory suspension hardware provided with or for VTX systems must be inspected for fatigue at least once a year or as required by
local ordinance. The inspection must include a visual survey of the material for signs of corrosion, bending, or any other condition that
may decrease the strength of the fastener. Additionally, any eyebolts must be checked for possible spin-out of the enclosure.
For all other hardware and fittings, refer to the hardware manufacturer’s inspection and maintenance guidelines for process.

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VTX A8| User Manual
2.7 SYMBOLS
The following symbols are used in this document:
CAUTION: This symbol gives notice of a potential risk of harm to the individual or the equipment. Instruction
marked with this symbol must be strictly followed.
TIP: This symbol gives notice of helpful, relevant information about the topic.
INSTRUCTIONS: This symbol gives notice of instructions that must be followed for proper installation and use of
the product.
TOOLS REQUIRED: This symbol gives notice of tools that must be used for proper installation and use of the
product.
JBL is not responsible for the application of its products for any purpose or the misuse of this information for any purpose. Furthermore,
JBL is not responsible for the abuse of its products caused by avoiding compliance with inspection and maintenance procedures or
any other abuse.
Prior to suspending the system, an expert, trained and experienced in suspending speaker systems, should inspect all parts and com-
ponents.

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VTX A8| User Manual
3 - SYSTEM COMPONENTS
VTX A8 VTX B18
VTX B28
Crown I-Tech HD Amplifiers Crown Audio V-Rack
Menu/Exit
Prev
Next
Power
Bridge 1/2
Bridge 3/4
Data
DRIVECORE SERIES
Fault
Thermal
Clip
-10
-20
Signal
Ready
1234
Fault
Thermal
Clip
-10
-20
Signal
Ready
1
Power
Bridge 1/2
Bridge 3/4
Data
Menu/Exit Prev Next
Fault
Thermal
Clip
-10
-20
Signal
Ready
2
12

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VTX A8| User Manual
4.1 VTX A8 AF - ARRAY FRAME
• Compatible with VTX A8 and VTX B18
• Maximum Limit: (24) VTX A8 / (13) VTX B18
• 0.5 degree pick-point resolution
• Built-in storage position for extension bar
• Includes (1) VTX A8 AF EB extension bar
• Support for third-party laser inclinometers
• Compatible shackle size: 5/8 in
4.2 VTX A8 AF EB - ARRAY FRAME EXTENSION BAR
• Extension Bar for use with VTX A8 AF
• Single, front-to-back or side-by-side pick point options
• Includes (3) shackles and mounting brackets
• Compatible shackle size: 5/8 in
4 - COMPATIBLE ACCESSORIES
All listed accessories are compatible with the VTX A8 and, in some cases, the VTX B18. For subwoofer specific accessories refer to the
B18 User Manual and Rigging Manual found at www.jblpro.com.
4.3 VTX A8 MF - MINI FRAME
• Compatible with VTX A8 and VTX B18
• Maximum Limit: (10) VTX A8 / (4) VTX B18
• Single-point and side-by-side pick-point options
• Three-part collapsible design
• Compatible shackle size: 1/2 in

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VTX A8| User Manual
4.5 VTX A8 VT - VERTICAL TRANSPORTER
• Vertical transport cart for (4) VTX A8 enclosures
• Truck-friendly dimensions
• Includes a hard top (VT-TOP)
• Built-in stacking features for easy storage
• Heavy-duty casters
4.6 VTX A8 VT CVR - SOFT COVER
• Heavy-duty soft cover for VTX A8 enclosures
• Covers four VTX A8 enclosures on a VTX A8 VT
• Includes input panel flaps for testing purposes
• Clear see-through pocket for shipping labels
• Handle cutouts for easy transportation
• Folds and stores in the VTX A8 VT
4.7 VTX A8 BP - BASE PLATE
• Used for ground stacking VTX A8
• Maximum Limit: (8) VTX A8 cabinets
• Connects VTX A8 cabinets to subwoofers
• Universal M20 attachment method
• Tilt range: -15 degrees to +5 degrees
4.4 VTX A8 SB - SUSPENSION BAR
• Compatible with VTX A8 and VTX B18
• Maximum Limit: (24) VTX A8 / (16) VTX B18
• Used for pull-back applications
• Shackle Size: 5/8 in

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VTX A8| User Manual
4.9 VTX DELTA - DELTA PLATE
• Universal delta plate accessory for VTX systems
• Allows for +/- 10 degree horizontal adjustments
• Includes three 5/8 in shackles
• Working Load Limit: 2,177 kg (4,800 lbs)
4.8 VTX RC500 - ROTATING CLAMP
• Universal truss/pipe clamp adapter
• Working Load Limit: 500 kg (1,100 lbs)
• Adjustable clamping mechanism
• Pipe range: 1 – 2.0 in
• Includes bearing for smooth 360-degree rotation
• 10-degree rotation marks for horizontal array aiming
TIP: For subwoofer-specific accessories, refer to the subwoofer user and rigging manuals found at www.JBLpro.com.
CAUTION: Always use components and accessories specified and approved by JBL Professional. When a cart is
used, use caution when moving the cart to avoid injury from tip-over.

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VTX A8| User Manual
5 - SOFTWARE
5.1 LINE ARRAY CALCULATOR 3 TM
LAC is simulation software for designing and predicting VTX Se-
ries systems. LAC predicts the acoustical performance of line array
systems, as well as flown and ground-stacked subwoofer arrays.
Subwoofer delay values can be generated for electronic delay
steering (EDS) using the built-in coverage calculator. LAC also per-
forms mechanical validation of rigging hardware, calculates weight
limits, and generates safety warnings.
www.jblpro.com/lac3
5.2 ARRAY LINK TM
Array Link is a mobile companion app that works in conjunction
with LAC software to assist in deployment of VTX Series systems.
Array Link uses a QR code system to transfer all mechanical ar-
ray information from the main LAC application to a mobile phone.
All relevant rigging and mechanical options are presented in an
easy-to-understand layout. The application is compatible with
iOS®and AndroidTM and can be obtained from their respective app
stores.
5.3 PERFORMANCE MANAGER TM
Performance Manage is a configuration and control application for
networked audio systems. Performance Manager’s user interface
guides system designers through the complete system design,
configuration, and control processes. A dedicated show mode
provides all monitoring and control functions needed to deliver a
complete picture of the system’s performance in real time.
www.jblpro.com/performancemanager

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VTX A8| User Manual
6 - INTRODUCTION
6.1 VTX A8
The VTX A8 is a next-generation line array element that delivers JBL Professional’s flagship VTX A Series technology in a compact solu-
tion for small to mid-size rental and installed applications. The VTX A8 was designed to solve the diverse sound reinforcement needs
of production companies, rental houses, theaters, houses of worship, as well as production applications requiring front fills, side arrays
or other auxiliary support for larger-scale VTX systems. Proprietary woofers and our latest-generation high-frequency transducer and
waveguide technology, provide unmatched performance, efficiency, and a consistent 110-degrees of horizontal coverage. The A8 com-
bines two 8-inch woofers, four 3.5-inch midrange drivers and two 2-inch high frequency drivers in a single low-profile cabinet. Propri-
etary double-flared low frequency ports, precisely calculated for greater low frequency performance extend the usable operating range
down to 49 Hz. The VTX A8 shares the VTX A Series’ patented rigging mechanism and suspension system for streamlined deployment,
while a comprehensive suite of accessories open up a world of configuration options.
INSIDE THE INNOVATIONS
For VTX A8, transducers were engineered from the ground up by JBL
to match the physical characteristics of its compact enclosure. Cus-
tom-designed low and mid frequency sections along with flagship
VTX A-Series two-inch compression drivers deliver higher output,
lower distortion and greater low frequency extension. Physical de-
sign refinements integrate more drivers in a smaller, lighter cabinet,
for maximum output in a dramatically reduced footprint. It all adds
up to big-system JBL sound in a flexible, compact line array system.
INNOVATIVE RIGGING
The VTX A8 rigging is identical to the A12 rigging, for quick,
easy deployment of integrated systems. The rigging features
an auto-locking mechanism, which allows the selection of an-
gles while components are on the ground; once the system is
suspended, the mechanism automatically locks cabinet angles
in designated positions. Set angles simply by pulling and plac-
ing a pin—it’s that easy.
ACCESSORIES
Multiple accessory options provide flexibility in the VTX A8’s
mounting, integration and installation capabilities. Highlights
include a Base Plate that mounts the A8 on top of ground-
stacked subwoofers such as the new B18. The truss clamp
and mini frame enable the A8 to be mounted on a truss, mak-
ing it ideal for trade shows or small productions.
3-WAY, 2-CHANNEL DESIGN
The VTX A8 features a three-way design, but utilizes a passive net-
work to drive both the MF and HF sections with a single amplifier
channel. Reducing system amplifier count translates to simpler con-
figuration, less total weight and truck space, and lower overall costs.

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VTX A8| User Manual
6.2 VTX B18
The VTX B18 is JBL Professional’s single 18-inch subwoofer, designed to complement VTX full-range sound reinforcement systems. The
VTX B18 features JBL’s 2288H 18-inch woofer, engineered for improved linearity, increased sensitivity and extra-long excursion. The
2288H is based on JBL’s Differential Drive, dual voice coil, dual gap technology, which delivers better heat dissipation, lower power com-
pression, and wider dynamic range than conventional single-coil designs. The B18 incorporates a patented Slip Stream™ double-flared
exponential low frequency port design to improve airflow and reduce audible turbulence, even at maximum excursion. The B18 shares
the industrial design of the VTX A-Series products and has the same width and suspension hardware as the VTX A8, allowing the two
products to be used together in a variety of flown or ground stacked configurations. B18 subwoofers can be deployed in omnidirectional
or cardioid arrays, ground stacked, or in suspended configurations of up to 16 enclosures.
TRANSDUCER DESIGN
The VTX B18 features a JBL 2288H 18-inch high-performance woof-
er engineered from the ground up to deliver transparent, linear bass
response down to 28 Hz. The 18-inch driver leverages a patented
fourth-generation Differential Drive technology to deliver maximum
sensitivity and power handling in a light, compact design.
CONTROLLABLE COVERAGE
The B18 makes it simple to form omnidirectional or cardioid
arrays. Speaker connectors are available on both front and
rear panels, streamlining cable management in either config-
uration. A switch on the rear input panel allows for selecting
between channel 1 or 2 of the NL4 cable, minimizing cable
requirements.
VTX BUILD QUALITY
The VTX B18 adopts the VTX A-Series’ signature full-face grill
design, which minimizes exposed components and protects
the loudspeaker from extreme conditions. The enclosed grill
helps the system achieve a higher Ingress Protection (IP55)
rating.
VTX A8 COMPATIBILITY
The B18 rigging system is compatible with the VTX A8 rigging sys-
tem, allowing B18 subwoofers to be suspended above an A8 array.
The VTX B18 rigging system allows for omnidirectional or cardioid
configurations in small and large-scale flown or ground-stacked ar-
rays. All VTX A8 suspension accessories are compatible and arrays
of up to 16 enclosures can be created.

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VTX A8| User Manual
7 - CONNECTIONS
The JBL VTX A8 is equipped with two Neutrik NL4 speakON connectors. The NL4 connectors are wired in parallel and can be used as
the system input or as a through connection for daisy-chaining multiple cabinets together. The NL4 connectors are installed upside
down so that the locking pin position can be seen from under the array.
The VTX B18 is equipped with four Neutrik NL4 speakON connectors, two at the rear for the cabinet and two at the front grill. All four NL4
connectors are wired in parallel and can be used interchangeably. The NL4 connectors at the front of the B18 are typically used when
the B18s are setup in a cardioid configuration, where some of the enclosures are pointed backwards. All NL4 connectors are installed
upside down so that the NL4 locking pin position can be seen from under the array.
Designedin Los Angeles, CA
Madein Mexico
A8
Compact Dual 8” Line Array Element
PINOUT
Pin1
Pin2
LF
MHF
IN/OUT IN/OUT
NL4 Connectors : IN/OUT
A channel selection switch is available at the rear of the B18, which selects between Pin 1 and Pin 2 of the NL4 connector. The switch is
wired after the NL connectors and affects all connections equally. For more information on the B18, refer to the VTX B18 User Manual.
CAUTION: Always use high-quality insulated speaker cables made by reputable manufacturers. Keep cable length
as short as possible with sufficient gauge for the application.
Front NL4 Connectors : IN/OUT
B18
Compact Single 18” Subwoofer
IN/OUT IN/OUT
AB
ChannelSelec tion
SN
Rear NL4 Connectors : IN/OUT
Channel Selection Switch

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VTX A8| User Manual
7.2 B18 INTERNAL WIRING
7.1 A8 INTERNAL WIRING
1+
1-
2+
2-
1+
1-
2+
2-
Passive Network
MF / HF
LF
HF
MF
NL4
Pin Selection
Switch
A B
1+
1-
2+
2-
1+
1-
2+
2-
1+
1-
2+
2-
1+
1-
2+
2-
SUB
FRONT NL4 REAR PANEL NL4

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VTX A8| User Manual
8 - SYSTEM AMPLIFICATION & WIRING
Like all other VTX systems, the VTX A8 and B18 cabinets are powered exclusively by Crown I-Tech HD amplifiers, providing consisten-
cy and optimum performance anywhere in the world. All speaker processing is performed using the I-Tech HD’s internal processing,
which includes the advanced LevelMaxTM three-stage limiter suite, ensuring proper, reliable operation under any conditions. LevelMax
incorporates excursion control, RMS limiting, and long-term thermal protection for the transducers. The I-Tech HD amplifiers also offer a
user-adjustable input section for equalization, time alignment, and electronic delay steering. Standard JBL presets are available for both
the Crown I-Tech 4x3500HD and I-Tech 12000HD. The most up-to-date presets are available for download from www.jblpro.com, and
bundled in the latest version of Performance Manager control software.
8.1 USING A8 WITH CROWN I-TECH 4X3500HD
When using Crown I-Tech 4x3500HD amplifiers, up to six VTX A8 loudspeakers (three per circuit) can be powered per amplifier. Based
on the power demands of the A8, this allows for optimum power-to-transducer ratio without compromising the maximum SPL capabil-
ities of the system. Circuits with two cabinets can be used to create smaller coverage areas in the venue for finer control. The example
below illustrates how to connect six VTX A8 cabinets to an I-Tech 4x3500HD amplifier using standard four-contact NL4 cables.
Amplifier Channels
Channel 1 A8 LF
Channel 2 A8 MF/HF
Channel 3 A8 LF
Channel 4 A8 MF/HF
Crown I-Tech 4x3500HD (6) VTX A8
NL4 Cables
CH1/CH2CH1/CH2 CH3/CHCH3/CH44
OUTPUTSOUTPUTS
Amplifier Rear Panel

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VTX A8| User Manual
Standard NL8 cables can be used to connect VTX A8 cabinets to a Crown I-Tech 4x3500HD amplifier using an NL8-to-two-NL4 break-
out cable. Using this breakout cable, up to six VTX A8 cabinets can be connected to a four-channel amplifier using a single NL8 cable,
saving cables and simplifying wiring.
8.2 USING A8 WITH CROWN I-TECH HD (2-CH)
When using Crown I-Tech HD amplifiers (two-channel), up to three VTX A8 loudspeakers can be powered per amplifier. One channel is
used for powering the low frequency section and another for the mid and high frequency sections. Based on the power demands of the
A8, this allows for optimum power-to-transducer ratio without compromising the system’s maximum SPL capabilities. Circuits with two
cabinets can be used to create smaller coverage areas in the venue for finer control. The example below illustrates how to connect three
VTX A8 cabinets to a two-channel I-Tech HD amplifier using a standard four-contact NL4 cable.
(3) VTX A8Crown I-TECH HD
Crown I-Tech 4x3500HD
(6) VTX A8
NL8 Cable
NL4 Cable
CH1/CH2CH1/CH2 CH3/CHCH3/CH44
OUTPUTSOUTPUTS
Amplifier Rear Panel
Amplifier Rear Panel
Amplifier Channels
Channel 1 A8 LF
Channel 2 A8 MF/HF