JBL VTX B15 User Manual
JBL VTX B15 Manual
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- JBL VTX B15 | User Manual - Page 1
VTX B15 | User Manual - JBL VTX B15 | User Manual - Page 2
VTX B15 | User Manual GENERAL INFORMATION VTX B15 User Manual Document Number: 1000364848 Version: A-EN Distribution Date: July 25, 2022 Copyright © 2022 by HARMAN International; all rights reserved JBL PROFESSIONAL 8500 Balboa Blvd Northridge, CA 91329 USA - JBL VTX B15 | User Manual - Page 3
VTX B15 | 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 creative engineering. VTX products herald the next generation in line array loudspeaker systems: a new era in - JBL VTX B15 | User Manual - Page 4
VTX B15 | User Manual TABLE OF CONTENTS 1 - SAFETY 6 1.1 Safety Instructions 6 1.2 General Hardware Information 6 1.3 Attachment to Structures 6 1.4 Important Safety Warning 6 1.5 Are You New to Rigging 7 1.6 Inspection and Maintenance 7 1.7 Symbols 8 1.8 Resources and Documentation 8 2 - - JBL VTX B15 | User Manual - Page 5
VTX B15 | User Manual 10.4 Flown Array Configurations 25 10.5 Cardioid Presets in Performance Manager 26 11 - SYSTEM TESTING 27 11.1 Using a DMM (Digital Multimeter 27 11.2 Using Performance Manager 28 11.3 Performance Manager Readings 28 12 - SPECIFICATIONS 29 12.1 VTX B15 29 12.1 VTX B15G - JBL VTX B15 | User Manual - Page 6
VTX B15 | User Manual 1 - SAFETY 1.1 SAFETY INSTRUCTIONS 1. Read these instructions. 2. Keep these instructions. 3. Heed all warnings. 4. Follow all instructions. dropped. 11. Contact JBL Professional for advanced servicing issues. 12. CAUTION - DO NOT PERFORM ANY SERVICING UNLESS YOU ARE QUALIFIED - JBL VTX B15 | User Manual - Page 7
VTX B15 | User Manual 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 - JBL VTX B15 | User Manual - Page 8
VTX B15 | 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 and hardware video tutorials are available for watching on the JBL Professional YouTube channel. 8 - JBL VTX B15 | User Manual - Page 9
2 - SYSTEM COMPONENTS VTX B15 | User Manual VTX B15 VTX A6 VTX B15G Fault Thermal 1234 Clip -10 -20 Signal Ready Menu/Exit Prev Next DRIVECORE SERIES Power Bridge 1/2 Bridge 3/4 Data Fault 1 Thermal 1 Clip -10 -20 Signal Ready - JBL VTX B15 | User Manual - Page 10
below are compatible with the VTX B15. For more detailed information about B15 accessories, refer to the VTX B15 Rigging Manual found at www.jblpro.com. VTX A6 MF | Mini Frame VTX A6 SB | Suspension Bar VTX A6 CM | Ceiling Mount VTX B15 ACC | Caster Board & Cover VTX B1 GND | Ground Stack - JBL VTX B15 | User Manual - Page 11
4 - SOFTWARE VTX B15 | User Manual 4.1 LINE ARRAY CALCULATOR 3TM LAC-3 is simulation software for designing and predicting VTX Series systems. LAC predicts for networked audio systems. Performance Manager's user interface guides system designers through the complete system design, configuration, - JBL VTX B15 | User Manual - Page 12
5 - OVERVIEW VTX B15 | User Manual 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 - JBL VTX B15 | User Manual - Page 13
VTX B15 | User Manual 6 - CONNECTIONS 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 - JBL VTX B15 | User Manual - Page 14
VTX B15 | User Manual 7 - TRANSPORTATION The VTX B15 ACC accessory kit includes a front face caster board for a single B15 and a protective cover. The ACC is an efficient solution for easy transportation and maximizing truck packs. Because of their small footprint, B15 subwoofers can be stacked on - JBL VTX B15 | User Manual - Page 15
VTX B15 | User Manual 7.1 CASTER BOARD INSTALLATION Two caster board tabs at the front of the B15 are used to secure the front face ACC caster board to the B15. The tabs are retractable and ship from the factory in the retracted position inside the B15. This orientation is ideal when B15s are used - JBL VTX B15 | User Manual - Page 16
ground-stacked VTX subwoofers. VTX A-SERIES VTX B15 VTX B18 VTX B28 8.3 PRODUCT LINE COMPATIBILITY The VTX B15 acoustical characteristics are compatible with those of the VTX B18 and B28. VTX B15, B18, and B28 can be combined together in the same system or array without summation problems. In - JBL VTX B15 | User Manual - Page 17
VTX B15 | User Manual 9 - AMPLIFICATION & WIRING The B15 subwoofer, like all other VTX systems, is powered exclusively by Crown I-Tech HD amplifiers, providing consistency and optimum performance anywhere in the world. All B15 electronic delay steering. Standard JBL presets are available for both - JBL VTX B15 | User Manual - Page 18
VTX B15 | User Manual Alternatively, all six B15 subwoofers can be daisy chained together for easier cabling , as it carries both channel signals, while the channel B connector does not. VTX B15 VTX B15 Amplifier Rear Panel I-TECH 12000HD CH-1 Channel Selection Switch CH-2 CAUTION: In this - JBL VTX B15 | User Manual - Page 19
VTX B15 | User Manual 9.2 CROWN I-TECH 12000HD (CARDIOID) Cardioid configurations can be created using Crown I-Tech 12000HD amplifiers. In this case, any one of the amplifier channels can be set for cardioid using JBL Performance Manager software. Up to three forward-facing or three rear-facing B15s - JBL VTX B15 | User Manual - Page 20
VTX B15 | User Manual 9.3 CROWN I-TECH 4X3500HD When using Crown I-Tech 4x3500HD amplifiers, up to eight B15 subwoofers can be powered per amplifier (two per channel). The example below illustrates how to connect eight subwoofers to a four-channel I-Tech HD amplifier using - JBL VTX B15 | User Manual - Page 21
: Make sure the total number of VTX B15 enclosures per circuit/amplifier does not exceed the maximum number recommended. 9.5 CROWN V-RACK VTX Series systems are compatible with the Crown V-Rack 12000HD and Crown V-Rack 4x3500HD touring racks. The number of supported cabinets per amplifier and wiring - JBL VTX B15 | User Manual - Page 22
VTX B15 | User Manual 10 - CARDIOID CONFIGURATIONS The directivity of a subwoofer is understood to be within the stacks. Since all configurations and ratios use the same set of amplifier presets (e.g. VTX B15 80 REAR), the amount of rear rejection is controlled by the front-to-rear-facing cabinet - JBL VTX B15 | User Manual - Page 23
VTX B15 | User Manual As previously discussed, subwoofers do exhibit some front-to-back directivity, resulting in 1:1 on-end 10.2 MINIMUM SPACING When creating large subwoofer arrays using cardioid blocks of B15 subwoofers, a distance of at least 1 meter (3.3 feet) should be allowed between stacks - JBL VTX B15 | User Manual - Page 24
VTX B15 | User Manual 10.3 MINIMUM SPACE FROM A WALL When cardioid subwoofer stacks are placed in front of a high-mass structure, like a concrete wall or stage, rear radiation patterns - JBL VTX B15 | User Manual - Page 25
VTX B15 | User Manual 10.4 FLOWN ARRAY CONFIGURATIONS Subwoofers in flown cardioid arrays should be configured in 2:1 or 3:1 building blocks and, when possible, in arrangements that are symmetrical, top - JBL VTX B15 | User Manual - Page 26
VTX B15 | User Manual 10.5 CARDIOID PRESETS IN PERFORMANCE MANAGER Performance Manager software allows Manager assigns the appropriate factory preset to the amplifier channel assigned to the selected B15. Cardioid arrays created in LAC-3 can be imported into Performance Manager with all parameters - JBL VTX B15 | User Manual - Page 27
. • The DCR value of a transducer gives an accurate representation of its electrical state. Mechanical defects will not be indicated by this test. Refer to the VTX B15 Service Manual for instructions on performing a rub-and-buzz test using a sine wave generator. 27 - JBL VTX B15 | User Manual - Page 28
VTX B15 | User Manual 11.2 USING PERFORMANCE MANAGER When in the field, Performance Manager's Test System Mode can be used to test VTX systems. This method is quick, and especially useful for determining whether all speaker cables, including cabinet-to-cabinet NL jumpers, are properly functioning. - JBL VTX B15 | User Manual - Page 29
iTech 9000HD (2) Crown iTech 12000HD (3) TRANSDUCERS Low Frequency : (1) JBL 2285H, 15 in diameter, dual 4 in diameter voice coil, as 2x RMS. 4: For more information on how to power B15 subwoofers, refer to the VTX B15 User Manual. 5: Nominal impedance within the stated frequency range of the - JBL VTX B15 | User Manual - Page 30
VTX B15 | User Manual 12.1 VTX B15G ACOUSTICAL Frequency Range (-10 dB) : 35 Hz-95 Hz (Preset: 80 Hz) (±3 : 8 ohms Crown iTech 9000HD (2) Crown iTech 12000HD (3) TRANSDUCERS Low Frequency : (1) JBL 2285H, 15 in diameter, dual 4 in diameter voice coil, neodymium Differential Drive® PHYSICAL - JBL VTX B15 | User Manual - Page 31
SPL (dB) 13 - ACOUSTIC MEASUREMENTS FREQUENCY RESPONSE 10 0 -10 -20 -30 20 100 VTX B15 80 1000 Frequency (Hz) VTX B15 60 10000 20000 14 - DIMENSIONS FRONT VTX B15 | User Manual REAR 536 mm (21.1 in) TOP/BOTTOM 586 mm (23.1 in) 446 mm (18.3 in) LEFT/RIGHT 31 - JBL VTX B15 | User Manual - Page 32
VTX B15 | User Manual 15 - CONTACT INFORMATION UNITED STATES OF AMERICA HARMAN Professional Solutions 8500 Balboa Blvd. Northridge, CA 91329 USA +1 (844) 776-4899 www.jblpro.com U.S.A. Technical Support www.jblpro.com/support China In-Country Support [email protected] HARMAN - JBL VTX B15 | User Manual - Page 33
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