JBL VTX Series User manual

VTX A12 | User Manual

VTX A12 | User Manual
GENERAL INFORMATION
VTX A12 - User Manual
Document Number: 1000297494
Version: D - EN
Distribution Date: December 3, 2020
Copyright © 2020 by HARMAN International; all rights reserved
JBL PROFESSIONAL
8500 Balboa Blvd
Northridge, CA 91329
USA

VTX A12 | 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 A12 | User Manual
TABLE OF CONTENTS
1 - DECLARATION OF CONFORMITY ...........................................................................6
2 - SAFETY .................................................................................................7
2.1 Safety Instructions ....................................................................................7
2.2 General Hardware Information ..........................................................................7
2.4 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 A12 AF - Array Frame .............................................................................11
4.2 VTX A12 AF EB - Array Frame Extension Bar ..............................................................11
4.3 VTX A12 SB - Suspension Bar ..........................................................................11
4.4 VTX A12 VT - Vertical Transporter .......................................................................12
4.5 VTX A12 VT CVR - Soft Cover ..........................................................................12
4.6 - VTX A12 VT GND - Ground Stack Accessory .............................................................12
4.7 VTX Delta - Delta Plate................................................................................12
4.8 VTX A12 BP - Base Plate ..............................................................................13
5 - SOFTWARE.............................................................................................14
5.1 Line Array Calculator 3TM ..............................................................................14
5.2 Array LinkTM ........................................................................................14
5.3 Performance ManagerTM ..............................................................................14
6 - INTRODUCTION .........................................................................................15
6.1 VTX A12/VTX A12W ..................................................................................15
6.2 VTX A12 vs VTX A12W ................................................................................16
6.3 Identifying A12 and A12W .............................................................................16
7 - CONNECTIONS .........................................................................................17
7.1 Internal Wiring ......................................................................................17
8 - SYSTEM AMPLIFICATION .................................................................................18
8.1 Using the A12 with Crown I-Tech 4x3500HD...............................................................18
8.2 Using the A12 with Crown I-Tech 12000HD................................................................19
8.3 Crown Audio V-Rack .................................................................................19
9 - VTX A12 PRESET LIBRARY................................................................................20
9.1 VTX A12 Preset Modes and Options .....................................................................20

VTX A12 | User Manual
10 - SUBWOOFER OPTIONS .................................................................................21
10.1 SUB/LF Preset Options...............................................................................21
10.2 Preset Example 1 ...................................................................................22
10.3 Preset Example 2 ...................................................................................22
10.4 Time Alignment.....................................................................................23
11 - FREQUENCY RESPONSE ................................................................................24
12 - LINE ARRAY CONTROL PANEL ...........................................................................25
12.1 Accessing LACP....................................................................................25
12.2 Filter 1 - Array Size Compensation .....................................................................26
12.3 Filter 2 - Atmospheric Absorption Compensation ..........................................................26
12.4 Filter 3 - HF Throw Distance Compensation ..............................................................26
12.5 Filters 4 & 5 - User PEQ 1 & 2 .........................................................................26
12.6 Example using LACP ................................................................................27
13 - TESTING VTX A12 ......................................................................................28
13.1 Using a DMM (Digital MultiMeter) ......................................................................28
13.2 Using Performance Manager ..........................................................................29
13.3 Performance Manager Readings .......................................................................29
14 - SPECIFICATIONS .......................................................................................30
14.2 VTX A12 Specifications ..............................................................................30
14.2 VTX A12W Specifications.............................................................................31
15 - ACOUSTIC MEASUREMENTS ............................................................................32
15.1 VTX A12 ..........................................................................................32
15.2 VTX A12W ........................................................................................32
16 - DIMENSIONS ..........................................................................................33
17 - CONTACTS INFORMATION ...............................................................................34

VTX A12 | User Manual
1 - DECLARATION OF CONFORMITY
Frank Lacelle
Compliance Manager - Harman International
BRAND: JBL Professional
FAMILY NAME: VTX A12 loudspeaker and suspension accessories
• VTX A12
• VTX A12W
• VTX A12 AF
• VTX A12 AF EB
• VTX A12 SB
• VTX A12 VT
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 A12 VT GND
• VTX DELTA

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VTX A12 | 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 A12 | 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 A12 | 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 A12 | User Manual
3 - SYSTEM COMPONENTS
VTX A12 / VTX A12W
VTX G28VTX S28
Crown I-Tech HD Amplifiers Crown 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
VTX B28

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VTX A12 | User Manual
4.1 VTX A12 AF - ARRAY FRAME
• Array Frame for suspending VTX A12 enclosures
• One Extension Bar included
• Built-in storage position for Extension Bar
• Single, front-to-back and side-by-side suspension points
• High-resolution single-point selection
• Support for up to (24) VTX A12 (array geometry dependent)
• Included laser bracket for LAP-TEQ and RECLINE
4.2 VTX A12 AF EB - ARRAY FRAME EXTENSION BAR
• Extension Bar for use with the VTX A12 AF
• Two Extension Bars can be used for side-by-side suspension
• Support for up to (24) VTX A12 (array geometry dependent)
• Three 5/8-inch shackles included
• Lightweight design
4 - COMPATIBLE ACCESSORIES
All listed accessories are compatible with both the VTX A12 and A12W. For more information on the accessories, refer to the accessory
specification sheets. For more information on usage, refer to the VTX A12 Rigging Manual available at www.jblpro.com.
4.3 VTX A12 SB - SUSPENSION BAR
• Compact suspension bar for VTX A12
• Connects to the top or bottom cabinet of an array
• Used to implement pull-back
• Used for suspending VTX A12 enclosures
• Support for up to (18) VTX A12
• Lightweight design
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 A12 | User Manual
4.5 VTX A12 VT CVR - SOFT COVER
• Heavy-duty cover for four VTX A12 enclosures
• Includes input panel access flaps for easy testing
• Clear see-through pocket for shipping labels
• Handle cutouts for easy transportation
• Padded front section for grill protection
4.6 - VTX A12 VT GND - GROUND STACK ACCESSORY
• Outrigger system for ground stacking VTX A12
• Support for up to six VTX A12 enclosures
• Four screw jacks are included for adjusting height
• Zero-gravity angle set hinge system
• Range: -15 to +5 degrees
• Connects to the VTX A12 VT
4.7 VTX DELTA - DELTA PLATE
• Universal delta plate accessory for VTX systems
• Support for up to (24) VTX enclosures
• Allows for +/- 10-degree horizontal adjustments
• Includes three 5/8-inch shackles
• Working Load Limit: 2,177 kg (4,800 lbs)
4.4 VTX A12 VT - VERTICAL TRANSPORTER
• Vertical Transport cart for four VTX A12 enclosures
• Truck pack-friendly dimensions
• Hard top included for easy stacking and transportation
• Built-in stacking features for easy storage
• Ground stacking support with optional accessory
• Heavy-duty casters
• Constructed from steel and aluminum parts

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VTX A12 | User Manual
4.8 VTX A12 BP - BASE PLATE
• Enables ground stacking VTX A12 arrays
• Universal M20 threaded pole mount
• Attaches directly to VTX B28 subwoofer enclosure
• Array angles selectable between -15 degrees and +5 degrees
• Two-part lightweight design
• Support for up to six VTX A12 enclosures
• Connects directly to the VTX B28

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VTX A12 | User Manual
5 - SOFTWARE
5.1 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
5.2 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.
5.3 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 A12 | User Manual
6 - INTRODUCTION
JBL VTX A12 is a complete tour sound solution for mid- to large-sized touring applications and high-end fixed installations. VTX A12
was designed from scratch to address the unique challenges of rental companies, FOH engineers, and tour sound production crews.
Next-generation JBL transducer technology and waveguide design deliver unmatched performance, efficiency, and coverage. A pat-
ented JBL rigging mechanism and redesigned suspension system streamline deployment and setup. The VTX A12W is acoustically and
mechanically compatible with the A12 and offers a wider (120-degree) horizontal coverage pattern. VTX A12W can be used standalone
for applications that require wide horizontal coverage or in conjunction with A12 for combination arrays. Refinements to the mechanical
design maximize reliability and versatility, while minimizing size and dramatically reducing weight. VTX A12 isn’t just a superior line ar-
ray—it’s a completely new way to approach tour sound.
6.1 VTX A12/VTX A12W
KEY MESSAGES
INNOVATIVE RIGGING
VTX A12 marks a giant leap forward in how loudspeakers are
rigged and transported. Four array elements are stacked on
the vertical transporter cart for fast deployment. The rigging
features an auto-locking mechanism, which allows the selec-
tion of angles while components are on the ground; once the
system is suspended, the mechanism automatically locks cab-
inet angles in the designated positions. Set angles simply by
pulling and placing a pin—it’s that easy.
ACCESSORIES
Multiple accessory options provide flexibility in the VTX A12’s
mounting, integration and installation capabilities. Highlights
include a Base Plate that mounts the A12 on top of ground-
stacked subwoofers such as the B28. The array frame and
vertical transporter cart were purpose-built to meet both U.S.
and international truck pack dimensions for the most efficient
system transportation.
PERFORMANCE
JBL Professional is the world’s leading manufacturer of loudspeaker
systems, using custom-designed and built drivers for optimal per-
formance.
VTX A12’s high frequency (HF) section features three uniquely de-
signed drivers that combine the HF phasing plug and waveguide into
one part providing better tolerances and increased sensitivity above
10 kHz, while reducing distortion and overall weight.
The patented Radiation Boundary Integrator incorporates four 5.5-
inch mid frequency drivers into the high frequency waveguide while
providing a smooth surface for the high frequency horn.
A lightweight 12-inch low frequency woofer (LF) features a fourth-gen-
eration Differential Drive design that adds dual magnets to its dual
voice coil/dual gap construction, and a host of proprietary JBL tech-
nologies for increased excursion, power handling, and sensitivity.

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VTX A12 | User Manual
6.2 VTX A12 VS VTX A12W
The A12 is available in standard and wide-coverage versions. The A12 offers 90-degree horizontal coverage, while the A12W offers
120-degree horizontal coverage. The A12 and A12W are acoustically and mechanically compatible, and can be used to create homog-
enous or combination arrays. The A12W’s wider horizontal coverage pattern can be especially useful in providing additional coverage in
short-throw and medium-throw applications.
A12
A12 W
A12
A12 W
A12
A12 W
Mixed arrays of A12 and A12W cabinets can be built to satisfy specific coverage needs. As the listening distance from an array decreas-
es, so does its coverage width. Depending on the venue geometry, A12W speakers can be used at the bottom of an array for broad near-
field coverage. The use of identical components in the A12 and A12W ensures that the transition between the two models is seamless,
without noticeable discrepancies in voicing or headroom.
Since the A12 and A12W require different processing presets to function correctly, they should never be assigned to the same circuit
group. Plan array circuiting accordingly.
6.3 IDENTIFYING A12 AND A12W
From the front, the A12 and A12W look identical, resulting in a clean and consistent look, even when creating mixed arrays. The A12W
input panel is colored blue to differentiate the two models, even when the system is suspended and/or at a distance.

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VTX A12 | User Manual
7 - CONNECTIONS
The VTX A12 is equipped with two Neutrik NL8 speakON connectors, which are wired in parallel, so that one can be used to receive
input while the other acts as a through connection for daisy-chaining cabinets. The NL8 connectors are installed upside down, so that
the NL8 locking pin position can be seen from under the array.
VTX A12 internal NL8 pinout
NL8 Pin Pin 1 +/- Pin 2 +/- Pin 3 +/- Pin 4 +/-
Transducers LF Left LF Right MF HF
7.1 INTERNAL WIRING
1+
1-
2+
2-
3+
3-
4+
4-
1+
1-
2+
2-
3+
3-
4+
4-
LF
MF
HF
CAUTION: Always use high-quality insulated speaker cables from reputable manufacturers. Use cables with a
wire gauge sufficient for the application and keep cable length as short as possible.

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VTX A12 | User Manual
8 - SYSTEM AMPLIFICATION
Like all VTX systems, the VTX A12 is powered exclusively by Crown I-Tech HD amplifiers for optimum performance and consistency
around the world. Crown I-Tech HD Series amplifiers feature BSS Audio OMNIDRIVEHD™ processing on each amplifier channel, includ-
ing the acclaimed LevelMAX™ Limiter Suite and support for linear-phase FIR filters. All A12 processing is performed by the I-Tech HD’s
internal DSP; no other DSP is required. Crown amplifiers include a user-adjustable input section for room correction equalization, array
size compensation, and circuit adjustments.
Standard A12 presets are available for both the Crown I-Tech 4x3500HD and Crown I-Tech 12000HD. The most up-to-date presets
are available for download from www.jblpro.com, and are always bundled in the latest version of JBL’s Performance Manager control
software.
8.1 USING THE A12 WITH CROWN I-TECH 4X3500HD
A Crown I-Tech 4x3500HD amplifier can power up to three A12 loudspeakers. Based on the power demands of the A12, this allows for
optimum power-to-transducer ratio without compromising the maximum SPL capabilities of the system. When finer control of coverage
in a venue is needed, smaller coverage areas can be created by using circuits of two cabinets.
Amplifier Channels
Channel 1 A12 LF
Channel 2 A12 LF
Channel 3 A12 MF
Channel 4 A12 HF
Crown I-Tech 4x3500HD JBL VTX A12
CAUTION: The A12 and A12W require different presets, as each set of presets is designed for a specific speaker
type. A12 and A12W presets are not interchangeable, so the two models cannot be used within the same circuit
group. Independent amplifier drive is required.

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VTX A12 | User Manual
8.2 USING THE A12 WITH CROWN I-TECH 12000HD
A pair of Crown I-Tech 12000HD amplifiers can power up to three VTX A12 loudspeakers. One Crown I-Tech 12000HD powers the low
frequency section, while the other drives the mid and high frequency sections. Based on the power demands of the A12, this allows for
optimum power-to-transducer ratio without compromising the maximum SPL capabilities of the system. When finer control of coverage
in a venue is needed, smaller coverage areas can be created by using circuits of two cabinets.
Amplifier 1 - Channels
Channel 1 A12 MF
Channel 2 A12 HF
Crown I-Tech 12000HD JBL VTX A12
Amplifier 2 - Channels
Channel 1 A12 LF
Channel 2 A12 LF
8.3 CROWN AUDIO V-RACK
VTX A12 systems are compatible with the Crown V-Rack 12000HD and Crown V-Rack 4x3500HD touring racks. The number of sup-
ported cabinets per amplifier and wiring options remain the same as the Crown I-Tech examples illustrated in this document. For more
information on the Crown V-Rack products, refer to the V-Rack User Manuals and documentation.
TIP: Other channel assignments can be implemented when using two-channel Crown I-Tech HD amplifiers. Use JBL’s Per-
formance Manager control software to assign speaker presets.
CAUTION: Make sure the total number of VTX A12 enclosures per circuit/amplifier does not exceed the recom-
mended maximum.

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VTX A12 | User Manual
9 - VTX A12 PRESET LIBRARY
The VTX A12 preset library includes standard array and fill (FL) operating modes, along with full-range and 80 Hz low frequency proc-
cessing for combinations of the A12 with VTX subwoofers. Presets for cardioid array configurations are included for all VTX subwoofer
models. VTX presets are exclusively developed for Crown I-Tech HD amplifiers and come bundled with Performance Manager control
software. Audio Architect™ presets are also available and can be downloaded from www.jblpro.com. Please see below for a detailed
description of VTX A12 operating modes and subwoofer processing options, and refer to the Preset Library setup sheets for preset
descriptions, memory locations, and output channel assignments.
9.1 VTX A12 PRESET MODES AND OPTIONS
Two preset modes and two low frequency processing options are available:
VTX A12 FL: The FL presets (short for FILL) have a nominally flat frequency response and are designed for situations where one or two
A12 cabinets are appropriate, such as for distributed front fills. With this preset, the acoustical low frequency response of the system
extends down to 45 Hz (full-range).
VTX A12 FL 80: The FL 80 presets have nominally flat frequency response and are to be used in situations where one or two A12 cabi-
nets are appropriate, such as for distributed front fills. With this preset, the acoustical low frequency response of the system is set to 80
Hz and used when subwoofers are available.
VTX A12: This is the standard VTX A12 preset for array use. A high frequency shelving response is applied to offset LF/MF array buildup
for nominally focused arrays (equally spaced impact points over the desired audience coverage area). With this preset, the acoustical
low frequency response of the system extends down to 45 Hz (full-range).
VTX A12 80: This is the standard VTX A12 preset for array use with subwoofers. A high frequency shelving response is applied to offset
LF/MF array buildup for nominally focused arrays (equally spaced impact points over the desired audience coverage area). With this
preset, the acoustical low frequency response of the system is set to 80 Hz. The VTX A12 80 preset will generate the highest A-weighted
maximum sound pressure level.
TIP:
• Both the full-range and 80 Hz presets can be used with subwoofers, depending on the application and subwoofer
arrangement. For more information on subwoofer use, see chapter 10 – Subwoofer Options.
• Mixing FL and standard presets in the same array is not recommended.
• The VTX A12 presets provide a well-balanced tonal starting point for a given array size. The Array Size Compensation
filter in the JBL Line Array Control Panel (LACP) can be used to further fine-tune tonal balance for a given array size
and shape. Please refer to chapter 12 - Line Array Control Panel for more information.
CAUTION: All preset options are available for both the VTX A12 (90-degree coverage pattern) and the VTX A12W
(120-degree coverage pattern). A12 and A12W presets cannot be used interchangeably. Always use the appropri-
ate preset to guarantee proper system performance.