JBL VTX A12 User Manual
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JBL VTX A12 User Manual

JBL VTX A12 User Manual

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  • Page 1 A12 | User Manual...
  • Page 2 VTX A12 | User Manual General Information A12 - User Manual Document Number: 1000297494 Version: A-EN Distribution Date: 04/14/2017 Copyright © 2017 by HARMAN International; all rights reserved JBL Professional 8500 Balboa Blvd Northridge, CA 91329...
  • Page 3 Thank you for purchasing JBL VTX Series products Of all the achievements JBL has made over the years, the VTX Series stands as a milestone in the practical application of creative engineering. The next generation in line arrays, VTX heralds a new era in performance, system integration and user friendliness.

  • Page 4: Table Of Contents

    3.2 - VTX A12 AF EB - Array Frame Extension Bar ......
  • Page 5 VTX A12 | User Manual 10 - Frequency Response ................22 11 - Line Array Control Panel .

  • Page 6: Safety

    VTX A12 | User Manual 1 - SAFETY Before using a JBL VTX Series system, please review the following for important information on safety and protection of your investment. 1.1 SAFETY INSTRUCTIONS 1. Read these instructions 2. Keep these instructions 3.

  • Page 7: General Hardware Information

    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.

  • Page 8: Inspection And Maintenance

    JBL is not responsible for the application of its products for any purpose or the misuse of this information for any pur- pose. Furthermore, JBL is not responsible for the abuse of its products caused by avoiding compliance with inspection and maintenance procedures or any other abuse.

  • Page 9: Symbols

    VTX A12 | User Manual 1.6 - SYMBOLS The following set of symbols are used in this document: CAUTION: This symbol gives notice of a potential risk of harm to the individual or the equipment. In- struction marked with this symbol must be strictly followed.

  • Page 10: System Components

    VTX A12 | User Manual 2 - SYSTEM COMPONENTS VTX A12 VTX G28 Menu/Exit Fault Thermal 1 2 3 4 Power Clip Prev Bridge 1/2 Bridge 3/4 Data DRIVECORE SERIES Signal Next Ready VTX S28 Crown I-Tech 4x3500HD Fault Fault...

  • Page 11: Compatible Accessories

    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. 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.

  • Page 12: Vtx A12 Vt - Vertical Transport Cart

    3.6 VTX A12 VT GND - GROUND STACK KIT (PRELIMINARY) • Outrigger system for ground stacking VTX A12 • Support for up to 6 x VTX A12 enclosures • 4 x screw jacks are included for adjusting height • Zero-gravity angle set hinge system •...

  • Page 13: Software

    4.3 - ARRAY LINK JBL Array Link is a mobile companion app that works in con- junction with JBL’s LAC software to assist with deploying JBL VTX Series systems. Array Link uses a QR code sys- tem to transfer all mechanical array information from the main LAC application to a mobile phone.

  • Page 14: Vtx A12 Introduction

    JBL VTX A12 is a complete tour sound solution for mid- to large-size touring applications and high-end fixed installations. A solution designed from scratch to address the unique challenges of rental companies, FOH engineers and tour sound production crews.

  • Page 15: Vtx A12 Connections

    6 - VTX A12 CONNECTIONS The JBL VTX A12 is equipped with two Neutrik NL8 SpeakON connectors. Both NL8 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 A12 NL8 connectors are installed upside down so that the NL8 locking pin position can be seen from under the array.

  • Page 16: System Amplification

    LevelMAX™ Limiter Suite and support for linear-phase FIR filters. All VTX A12 processing is done using I-Tech HD internal processing and no other external DSP is required. The Crown amplifiers include a user-adjustable input section for room correction equalization, array size compensation and circuit adjustments.

  • Page 17: Crown I-Tech 12000Hd

    7.2 - CROWN I-TECH 12000HD When using Crown Audio I-Tech 12000HD amplifiers, up to 3 VTX A12 loudspeakers can be powered per pair of am- plifiers. One Crown I-Tech 12000HD is used for powering the low-frequency section and another for the mid- and high- frequency sections.

  • Page 18: Vtx A12 Preset Library

    45Hz (Fullrange). 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 cabinets are appropriate, such as distributed front fills. With this preset, the acoustical low-frequency re- sponse of the system is set to 80Hz and used when subwoofers are available.

  • Page 19: Subwoofer Options

    9 - SUBWOOFER OPTIONS VTX A12 presets are designed for a 3:2 minimum cabinet ratio (A12 : VTX S28 or G28 subwoofers). The 3:2 ratio provides sufficient headroom for both the subwoofers and the VTX A12s to reach MAX SPL (the limiters) at the same time, while maintaining a minimum of 10dB SUB to TOP low-frequency contour.

  • Page 20: Preset Example 1

    VTX A12 | User Manual 9.2 - PRESET EXAMPLE 1 VTX A12 or VTX A12 80 VTX A12 or VTX A12 80 VTX G28 60 or VTX G28 80 VTX G28 60 or VTX G28 80 9.3 - PRESET EXAMPLE 2...

  • Page 21: Time Alignment

    VTX subwoofer to be used with any VTX loudspeaker without needing specific sub- woofer presets for each system and configuration. When the VTX A12 is operated in full range mode with companion subwoofers, some additional delay should be applied to the subwoofers to match the A12.

  • Page 22: Frequency Response

    (box-to-box angles), and the listening distance. JBL factory presets are designed to create a well-balanced tonal starting point for given array conditions. For example, the standard VTX A12 array presets are designed to work optimally with array sizes between 8 - 12 cabinets and equal impact spacing for a flat listening plane. An array with these parameters will generate a flat frequency response in the HF region with a gradual rise in LF energy.

  • Page 23: Line Array Control Panel

    11.1 - ACCESSING LACP LACP filters can be modeled in JBL’s Line Array Calculator and then imported into JBL’s Performance Manager for appli- cation to actual devices. To access LACP within the Line Array Calculator, first create circuit groups by using the included grouping feature.

  • Page 24: Filter 1 - Array Size Compensation

    VTX A12 | User Manual 11.2 - FILTER 1 - ARRAY SIZE COMPENSATION Filter 1 is used to correct for LF/MF buildup when the array size/shape differ from that for which the factory preset was designed. LF adjustments should be applied to all cabinets within the array: therefore, filter 1 is automatically applied globally.

  • Page 25: Example Using Lacp

    11.6 - EXAMPLE USING LACP This example is for a 12-cabinet VTX A12 array. The standard A12 preset is used with the Array Size Compensation filter set to –3dB to offset LF buildup and achieve a flatter frequency response. As seen from the illustration below, Array Size Compensation is globally applied to all array circuits.

  • Page 26: Specifications

    JBL continually engages in research related to product improvement. Some materials, production methods and design refinements are introduced into existing products without notice as a routine expression of that philosophy. For this reason, any current JBL product may differ in some respect from its published description, but will always equal or exceed the original design specifications unless otherwise stated.

  • Page 27: Acoustic Measurements

    VTX A12 | User Manual 13 - ACOUSTIC MEASUREMENTS FREQUENCY RESPONSE BEAMWIDTH -180 1000 10000 20000 1000 20000 Frequency (Hz) Frequency (Hz) VTX A12 FL VTX A12 FL 80 VTX A12 Phase Horizontal Beamwidth 14 - DIMENSIONS 1091mm (42.99”) 330.2mm (13.0”) 1117mm (44.00”)

  • Page 28: Contact Information

    Pacific Coast Time in the U.S.A. (800) 8JBLPRO (800.852.5776) (800) 8JBLPRO (800.852.5776) www.JBLservice.com support@jblpro.com Professional Contacts, Outside the USA: Contact the JBL Professional Distributor in your area. A complete list of JBL Professional international distributors is provided at our U.S.A. website: www.jblpro.com...

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