JBL VTX Series User manual

VTX A6| User Manual

VTX A6| User Manual
GENERAL INFORMATION
VTX A6 - User Manual
Document Number: 1000364848
Version: A-EN
Distribution Date: July 22, 2022
Copyright © 2022 by HARMAN International; all rights reserved
JBL PROFESSIONAL
8500 Balboa Blvd
Northridge, CA 91329
USA

VTX A6| 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 compre-
hensive system approach to deliver a premium experience for all who come into contact with them, 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 A6| User Manual
TABLE OF CONTENTS
2 - SYSTEM COMPONENTS ..................................................................................9
3 - COMPATIBLE ACCESSORIES..............................................................................10
3.1 VTX A6 MF - Mini Frame ..............................................................................10
3.2 VTX A6 SB - Suspension Bar ...........................................................................10
3.3 VTX A6 BP - Base Plate ...............................................................................10
3.4 VTX A6 CM - Ceiling Mount ............................................................................11
3.5 VTX A6 Case .......................................................................................11
3.6 VTX PM - Pole Mount.................................................................................11
3.7 VTX RC500 - Rotating Clamp. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.8 VTX Delta - Delta Plate................................................................................12
4 - SOFTWARE.............................................................................................13
4.1 Line Array Calculator 3TM ..............................................................................13
4.2 Array LinkTM ........................................................................................13
4.3 Performance ManagerTM ..............................................................................13
5 - OVERVIEW .............................................................................................14
5.1 VTX A6 ............................................................................................14
5.2 VTX B15 and B15G ..................................................................................15
6 - CONNECTIONS .........................................................................................16
6.1 A6 Internal Wiring ....................................................................................17
6.2 B15 Internal Wiring ...................................................................................17
7 - AMPLIFICATION & WIRING ................................................................................18
7.1 Using A6 With Crown I-Tech 4X3500HD ..................................................................18
7.2 Using A6 With Crown I-Tech HD (2-CH)...................................................................19
7.3 Using A6 and B15 With Crown I-Tech 4X3500HD ...........................................................20
7.4 Using A6 and B28 With Crown I-Tech 4X3500HD ...........................................................21
7.5 Crown V-Rack ......................................................................................21
8 - SPEAKER PRESETS .....................................................................................22
8.1 A6 Preset Modes ....................................................................................22
8.2 VTX B-Series Preset Modes and Options .................................................................22
9 - POLE-MOUNTING VTX A6.................................................................................23
9.1- Inter-Enclosure Angles................................................................................23
10 - SUBWOOFER OPTIONS .................................................................................24
10.1 SUB LF Preset Options ...............................................................................24
10.2 Time Alignment.....................................................................................25

VTX A6| User Manual
11 - CONFIGURATION EXAMPLES ............................................................................26
11.1 Small A6 System ...................................................................................26
11.2 Medium A6 System .................................................................................26
11.3 A8 and A6 System ..................................................................................27
12 - FREQUENCY RESPONSE ................................................................................28
13- SYSTEM TESTING.......................................................................................29
13.1 Using a DMM (Digital Multi Meter) ......................................................................29
13.2 Using Performance Manager ..........................................................................30
13.3 Performance Manager Readings .......................................................................30
14 - SPECIFICATIONS .......................................................................................31
15 - ACOUSTIC MEASUREMENTS ............................................................................32
16- DIMENSIONS...........................................................................................32
17- CONTACT INFORMATION ................................................................................33

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VTX A6| User Manual
1 - SAFETY
1.1 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.
1.2 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.
1.3 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.
1.4 IMPORTANT SAFETY WARNING
The information in this section has been assembled from recognized engineering data and is intended for informational purposes only.

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VTX A6| User Manual
1.5 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.
1.6 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.
Refer to the manufacturer’s guidelines for inspection and maintenance of all other hardware and fittings.
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.
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.

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VTX A6| User Manual
1.7 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. Instructions
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.
TIPPING HAZARD: This symbol gives notice of a potential tip hazard. Use caution when moving the cart/apparatus
combination to avoid injury from tip-over.
1.8 RESOURCES AND DOCUMENTATION
Several resources are available to VTX Series owners to illustrate proper and safe use of the equipment. Below is an overview of what
is available and a brief description of each resource:
USER MANUAL: This document focuses on the electromechanical aspects of the system, including amplification, wiring, speaker pre-
sets, tuning, and optimization. User manuals do not include information regarding rigging and suspension hardware.
RIGGING MANUAL: This document focuses on the mechanical aspects of the system, including step-by-step rigging instructions, ac-
cessory usage, mechanical limits, and safety instructions. All users must read this document.
SPECIFICATION SHEETS: These documents include detailed specifications for loudspeakers and accessories. Specifications include
acoustical performance, material types, weight, and general mechanical information. Specification sheets are available for each product.
CUSTOMER DRAWINGS: This is a collection of files that includes detailed drawings for each SKU. The collection consists of detailed
dimensional 2D PDF/DXF documents and simplified 3D DXF models. Depending on the product, additional types of 3D files might be
available for download at www.jblpro.com.
VIDEO TUTORIALS: Software and hardware video tutorials are available for watching on the JBL Professional YouTube channel.

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VTX A6| User Manual
2 - SYSTEM COMPONENTS
VTX A6 VTX B15
VTX B15G VTX B18 | VTX B28
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
Crown I-Tech HD Amplifiers

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VTX A6| User Manual
3 - COMPATIBLE ACCESSORIES
All listed accessories are compatible with the VTX A6 and, in some cases, the VTX B15. For subwoofer specific accessories refer to the
B15 User Manual and Rigging Manual found at www.jblpro.com.
VTX A6 MF | Mini Frame VTX A6 SB | Suspension Bar VTX A6 CM | Ceiling Mount
VTX RC500 | Rotating Clamp
VTX DELTA | Delta Plate
VTX A6 BP | Base Plate VTX PM | Pole Mount VTX A6 Road Case
VTX B15 ACC | Caster Board & Cover

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VTX A6| User Manual
VTX B1 GND | Ground Stack Accessory 229-00009-01 | M10 Eyebolt Set
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.
VTX B28 GND | Ground Stack

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VTX A6| User Manual
4 - SOFTWARE
4.1 LINE ARRAY CALCULATOR 3TM
LAC-3 is simulation software for designing and predicting VTX Se-
ries systems. LAC-3 predicts the acoustical performance of line
array systems, as well as flown and ground-stacked subwoofer ar-
rays. Subwoofer delay values can be generated for electronic delay
steering (EDS) using the built-in coverage calculator. LAC-3 also
performs mechanical validation of rigging hardware, calculates
weight limits, and generates safety warnings.
www.jblpro.com/lac3
4.2 ARRAY LINKTM
Array Link is a mobile companion app that works in conjunction
with LAC-3 software to assist in deployment of VTX Series sys-
tems. Array Link uses a QR code system to transfer all mechani-
cal array information from the main LAC-3 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.
4.3 PERFORMANCE MANAGERTM
Performance Manager 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 A6| User Manual
5 - OVERVIEW
5.1 VTX A6
The A6 line array element brings our flagship VTX A-Series technologies to a subcompact form factor for small to medium-sized touring
systems and fixed installations. The fully passive, two-way loudspeaker is a versatile solution for production companies, touring acts,
rental houses, theaters and houses of worship, or anyone who demands superior sound reinforcement at any scale. Like all VTX prod-
ucts, the A6 is engineered for stunning sonic performance and ease of integration and deployment, as a standalone solution or as a
supplement to larger VTX systems. The A6 houses two custom 6.5-inch woofers and a three-inch annular diaphragm compression driver
and features all of the acoustic innovations that are hallmarks of the VTX series, from the patented Radiation Boundary Integrator™ (RBI)
to our proprietary Differential Drive®woofers. The A6 uses the industry-leading VTX A-Series rigging system, and a suite of available
accessories allows a range of flown, ground-stacked, and installed configurations.
INSIDE THE INNOVATIONS
The A6 acoustic design is centered around the RBI technology,
which places both the high and low frequency transducers on a sin-
gle unified horn, improving horizontal directivity while reducing size.
Specifically placed, low frequency projection apertures seamlessly
integrate the woofers onto the high frequency horn, and the position-
ing and spacing of the apertures control the LF horizontal directivity,
ensuring proper transition to the high frequency driver. The unusually
large unified horn extends to the edges of the cabinet, providing am-
ple loading for the compression driver and extending its usable oper-
ating range below 1 kHz. The result is a passive two-way system that
exhibits performance characteristics of larger three-way designs.
HIGH FREQUENCY SECTION
The A6 uses an innovative high frequency section that integrates the
compression driver, phasing plug, and waveguide into a single unified
device. The three-inch lightweight, polymer annular diaphragm re-
INNOVATIVE RIGGING SYSTEM
The A6 uses the VTX A-Series’ patented rigging system for ac-
curate, easy deployment. Angles are set on the ground; once the
system is suspended, a locking mechanism automatically secures
cabinets in designated positions. Accessories allow for a wide
range of flown, ground-stacked, and installed configurations.
duces mass and improves high frequency extension. The V-shape
of the diaphragm reduces breakup modes that cause distortion
and time smear. A unique sinusoidal-shaped exit provides mul-
tiple paths, ensuring sound from the entire diaphragm reaches
the waveguide entrance. The large diaphragm offers better low
frequency extension, allowing for a lower crossover point and pro-
viding a perfect directivity match between the LF and HF sections.
The A6 HF section shares the same materials and design as the
A8 and A12, maintaining the A-Series HF sound signature and
providing common voicing across the family.

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VTX A6| User Manual
5.2 VTX B15 AND B15G
The VTX B15 Compact Arrayable 15-inch Subwoofer extends the low end performance of VTX full-range sound reinforcement systems,
including the VTX A6 Subcompact Dual 6.5-inch Line Array Element. The B15 is a versatile solution for production companies, touring
acts, rental houses, theaters, houses of worship, or anyone who demands superior sound reinforcement when space is at a premium.
The B15 joins the VTX B-Series subwoofer family in harnessing VTX acoustic innovations such as SlipStream™ double-flared expo-
nential ports and Differential Drive® dual voice coil woofer design. The B15 has the same width and suspension hardware as the A6,
allowing the two products to be combined in a range of flown and ground-stacked configurations. Together with the A6, the B15 brings
flagship VTX sound quality and performance to a compact footprint, whether supporting small and midsize applications or supplement-
ing large VTX systems. It’s never been easier to deliver impactful, VTX-quality sound at any scale.
TRANSDUCER DESIGN
The B15 features a high performance 15-inch woofer based on the
patented Differential Drive technology, which uses a unique dual
voice coil, dual gap design. The extra surface area provided by the
dual four-inch voice coil design delivers better heat dissipation and
lower power compression than conventional single-coil designs.
The dual neodymium magnets are placed inside the coils, reducing
weight and improving magnetic efficiency. The outside of the woofer
is a unified cast aluminum frame, which acts as a large heat sink to
cool down the woofer. The ultra-robust carbon fiber-based cone cre-
ates a rigid diaphragm, significantly reducing mass and cone break-
up distortion. The result is a robust 15-inch woofer with an impres-
sive peak-to-peak maximum excursion that rivals 18-inch designs.
CONTROLLABLE COVERAGE
The B15 makes it simple to form omnidirectional or cardioid ar-
rays. Speaker connectors are available on both front and rear
panels, streamlining cable management in either configuration. A
switch on the rear input panel allows selecting between channel
one or two of the NL4 cable, minimizing cable requirements.
VTX A6 COMPATIBILITY
The B15 features a captive, spring-loaded mechanism for quick
deployment and quiet operation. The rigging system allows for
omnidirectional or cardioid configurations in small and large-scale
flown or ground-stacked arrays. The rigging system is compatible
with the A6, allowing B15 subwoofers to be suspended above A6
cabinets in flown arrays, or stacked on top of B15 using the A6
Base Plate accessory. All A6 suspension accessories are compat-
ible, and arrays of up to 15 subwoofers can be created.

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VTX A6| User Manual
6 - CONNECTIONS
The A6 is equipped with two Neutrik NL4 speakON connectors which are wired in parallel and can be used as the system input or as a
through connection for daisy-chaining multiple cabinets The connectors are installed upside down, making the locking pin position vis-
ible from under the array. The channel selection switch selects between pins 1 (“A” position) and 2 (“B” position) of the NL4 connector.
The B15 is equipped with four Neutrik NL4 speakON connectors, two on the rear and two on the front grill. All four connectors are wired
in parallel and can be used interchangeably. The front connectors are typically used when B15s are in a cardioid mode, where some en-
closures are pointed backwards. The connectors are installed upside down, making the locking pin position visible from under the array.
NL4 Connectors : IN/OUT
A channel selection switch available at the rear of the B15 selects between pins 1 (“A” position) and 2 (“B” position) of the NL4 Connec-
tor. The switch is wired after the NL connectors and affects all connections equally. For more information on the B15, refer to the VTX
B15 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 Channel Selection Switch
Channel Selection Switch
Rear NL4 Connectors : IN/OUT

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VTX A6| User Manual
6.2 B15 INTERNAL WIRING
6.1 A6 INTERNAL WIRING
1+
1-
2+
2-
1+
1-
2+
2-
Passive Network
LF / HF
LF
HF
NL4
Pin Selection
Switch
AB
Pin Selection
Switch
AB
1+
1-
2+
2-
1+
1-
2+
2-
1+
1-
2+
2-
1+
1-
2+
2-
SUB
FRONT NL4REAR PANEL NL4

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VTX A6| User Manual
7 - AMPLIFICATION & WIRING
Like all other VTX systems, the A6 and B15 are powered exclusively by Crown I-Tech HD amplifiers, providing consistency and opti-
mum performance anywhere in the world. All speaker processing is performed by the I-Tech HD’s internal processing, which includes
the advanced LevelMaxTM three-stage limiter suite, to ensure proper, reliable operation under any conditions. LevelMax incorporates
excursion control, RMS limiting, and long-term thermal protection for the transducers. 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.
7.1 USING A6 WITH CROWN I-TECH 4X3500HD
When using Crown I-Tech 4x3500HD amplifiers, up to 16 VTX A6 loudspeakers can be powered per amplifier, four per circuit group.
Circuit groups with two or three cabinets can be used to create smaller coverage areas in the venue for finer control. The example be-
low illustrates how to connect 16 VTX A6 cabinets to an I-Tech 4x3500HD amplifier using standard four-contact NL4 cables and the A6
channel selection switch.
Crown I-Tech 4x3500HD
NL4 Cables
CH1/CH2CH1/CH2 CH3/CHCH3/CH44
OUTPUTSOUTPUTS
Amplifier Rear Panel
AMPLIFIER CHANNELS
Channel 1 A6 LMH
Channel 2 A6 LMH
Channel 3 A6 LMH
Channel 4 A6 LMH

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VTX A6| User Manual
Standard NL8 cables can be used to connect A6 cabinets to a Crown I-Tech 4x3500HD amplifier using an NL8-to-two-NL4 breakout
cable. Using this breakout cable, up to 16 VTX A6 cabinets can be connected to a four-channel amplifier using a single NL8 cable to
save cables and simplify wiring.
7.2 USING A6 WITH CROWN I-TECH HD (2-CH)
When using Crown I-Tech HD amplifiers (two-channel), up to eight A6 loudspeakers can be powered per amplifier. 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 eight
VTX A6 cabinets to a two-channel I-Tech HD amplifier using a standard four-contact NL4 cable.
Crown I-TECH HD
Crown I-Tech 4x3500HD
Ch 1 & 2
NL4 Cable
CH1/CH2CH1/CH2 CH3/CHCH3/CH44
OUTPUTSOUTPUTS
Amplifier Rear Panel
Amplifier Rear Panel
NL8 to (2) NL4 Adapter
Ch 3 & 4
AMPLIFIER CHANNELS
Channel 1 A6 LMH
Channel 2 A6 LMH

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VTX A6| User Manual
7.3 USING A6 AND B15 WITH CROWN I-TECH 4X3500HD
A6 and B15 products can be combined on a single I-Tech 4x3500HD amplifier. In this case, the amplifier has enough resources to power
four B15 subwoofers and six to eight A6 cabinets.
CH1/CH2CH1/CH2 CH3/CHCH3/CH44
OUTPUTSOUTPUTS
Amplifier Rear Panel
Crown I-Tech 4x3500HD
AMPLIFIER CHANNELS
Channel 1 B15 SUB
Channel 2 A6 LMH
Channel 3 B15 SUB
Channel 4 A6 LMH
TIP: The factory VTX preset libraries for iTech HD amplifiers are configured with the same speaker preset for all amplifier
channels. Use JBL Performance Manager to freely assign speaker presets to amplifier channels and create the desired
preset combination.

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VTX A6| User Manual
7.5 CROWN V-RACK
VTX Series systems are compatible with the Crown V-Rack 12000HD and Crown V-Rack 4x3500HD touring racks. The number of cab-
inets supported by each amplifier and the wiring options remain the same as the Crown I-Tech examples illustrated in this document.
For more information on Crown V-Rack products, refer to the V-Rack User Manual and documentation.
I-Tech 4x3500HD
CH1/CH2CH1/CH2 CH3/CHCH3/CH44
OUTPUTSOUTPUTS
Amplifier Rear Panel
(2) VTX B28
(6) VTX A6
NL4 Cable
CAUTION: Attempting to drive more than two B28 enclosures from a single 4X3500HD is not recommended and
may degrade performance.
7.4 USING A6 AND B28 WITH CROWN I-TECH 4X3500HD
When using Crown I-Tech 4x3500HD amplifiers, up to two VTX B28 subwoofers can be powered per amplifier and the remaining chan-
nels can be used to power a JBL full-range speaker, such as the VTX A6.
AMPLIFIER CHANNELS
Channel 1 B28 SUB
Channel 2 B28 SUB
Channel 3 A6 LMH
Channel 4 A6 LMH
NL4 Cable