Arrayable Dual-18-inch Subwoofer


The VTX B28 is JBL Professional’s next-generation dual 18-inch subwoofer, designed to complement the company’s flagship VTX full-range sound reinforcement systems, and capable of delivering uncompromised low-frequency performance, even for the most demanding shows on the planet. The B28 boasts JBL Differential Drive transducers, an exclusive port design, and the same industrial design found in JBL’s VTX A-Series products. It is equally ideal flown or ground stacked, in omnidirectional or cardioid configurations. Simple and fast rigging, a selection of accessories, and software support make the B28 an exceptional choice for rental, AV, and touring companies, as well as in high-end fixed installations.

A simple, integral, two-point rigging system allows flown arrays of up to 16 B28 enclosures. Three M20 pole mount attachments on the enclosure’s top can interface with standard Base Plate accessories for the A12, A8, and V20 systems to create ground stacked systems. B28 systems are powered exclusively by Crown I-Tech HD amplifiers and are fully integrated into JBL’s software ecosystem.


  • Delivers transparent, linear bass response down to 25 Hz
  • JBL Differential Drive woofers
  • Large double-flared port for greater extension and reduced turbulence
  • Simple 2-point spring-loaded rigging system
  • FEA-optimized enclosure
  • Front and rear NL4 connectors
  • Support for omnidirectional or cardioid modes
  • Acoustically compatible with all VTX full-range products
  • Flexible accessory options


"The definition and stereo imagery of the boxes were next level. The B28 Subs were so much, I had to lower them by about 10db during my sound check and also for showtime, which I almost never do for Hip Hop performances. To be clear! There were a lot of subs, but very punchy and smooth." 
—Courtney Taylor (FOH for G Eazy)


  Version Language Size Uploaded
file type icon VTX B28 Spec Sheet
en version C, updated: Dec 2020
en  379 KB Dec 2020
file type icon VTX B28 User Manual
en version C, updated: Jul 2023
en  8.1 MB Jul 2023
file type icon VTX B28 Rigging Manual
en version A, updated: Jul 2023
en  14.7 MB Jul 2023
file type icon VTX B28 Spare Parts
en version A, updated: Jul 2023
en  69.3 KB Jul 2023
CAD Drawings
file type icon VTX B28 Customer Drawings
version A, updated: Dec 2020
  1.1 MB Dec 2020
file type icon VTX B28 Revit Files
version 2.0, updated: Oct 2022
2.0    8.94 MB Oct 2022
file type icon VTX B28 Sketchup Files
version 2.0, updated: Oct 2022
2.0    1.2 MB Oct 2022
file type icon VTX B28 Archicad Files
version 1.0, updated: Jul 2022
1.0    1.44 MB Jul 2022
platform icon PerformanceManager
version, updated: Aug 2023     117 MB Aug 2023
platform icon Line Array Calculator III
version, updated: Sep 2023     24.2 MB Sep 2023
Declaration Of Conformity
file type icon VTX B28 EU Declaration of Conformity
en version A, updated: Feb 2021
en  206 KB Feb 2021
Ease Data
file type icon VTX B28 EASE GLL
version 1.0, updated: Dec 2020
1.0    1.28 MB Dec 2020
Preset Libraries
file type icon VTX B28 Preset Library
version 1.0.0, updated: Aug 2020
1.0.0    576 KB Aug 2020

If any of the links above result in strange characters in your browser, please right-click the file to save it to your computer.

Parts & Service


Frequency Range (-10dB) 25 Hz - 80 Hz (Preset: VTX B28 80)
Coverage Pattern Omnidirectional or Cardioid
Maximum Peak Output 141dB (Preset: VTX B28 80)
System Amplification Crown Audio I-Tech HD
System Impedance 4 ohms
LF Driver (2) JBL 2288H-M 18-inch woofers
Enclosure Finnish birch plywood, Black DuraFlex finish, four integral recessed handles
Suspension / Mounting Captive suspension plates, captive pins, spring-loaded mechanism, 2-step safety lock
Dimensions (H x W x D) 508 mm x 1324 mm x 750 mm
20 in x 52.1 in x 29.5 in
Net Weight 87 kg (191.8 lbs)


VTX B28 SB | Suspension Bar
VTX B28 SB Main photo
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  • Versatile suspension bar accessory for B28 subwoofer
  • Single-point and dual-point support
  • Secondary safety attachment points included
  • Support for (16) B28 enclosures
  • Lightweight, fully symmetric design
  • Shackle Size: 5/8 inch


  • (1) VTX B28 SB Suspension Bar
  • (2) 5/8 in 4.5 T Shackle

VTX B28 ACC | Accessory Casterboard and Cover for VTX B28
VTX B28 ACC Main photo
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  • Transportation kit for VTX B28
  • Includes protective cover and caster board
  • Handle cutouts and rear panel access flap
  • Tour-grade casters
  • Stackable for convenient storage
  • Rotating locking cam mechanisms for secure attachment to B28 enclosures


  • (1) Caster board for VTX B28
  • (1) Padded protective cover for VTX B28 (cover part number: 5123768-00)

VTX B28 VT | Vertical Transporter Accessory for VTX B28
VTX B28 VT Main photo
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  • Vertical transport cart for up to four VTX B28 enclosures
  • Truck-friendly dimensions
  • Built-in stacking features for easy storage
  • Lightweight aluminum design
  • Heavy-duty tour-grade casters
  • Compatible with the VTX A12 VT GND


  • (1) VTX B28 VT Vertical Transporter Cart

VTX B28 VT CVR | Vertical Transporter Cover for B28
VTX B28 VT CVR Main photo
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  • Heavy-duty soft cover for VTX B28 stacks
  • Covers three or four VTX B28 enclosures
  • Includes input-panel flaps for testing purposes
  • Clear see-through pocket for shipping labels
  • Handle cutouts for easy transportation
  • Heavy-duty industrial-grade zippers
  • Foldable design for storage


  • (1) VTX B28 VT CVR Cover

VTX B28 GND | Ground Stack Accessory for VTX B28
VTX B28 GND Main photo
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  • Improves stability of ground stacks built on the B28 subwoofer
  • Attaches directly to B28 integral rigging
  • Simple two-part design
  • Lightweight


  • (2) VTX B28 outriggers (left/right)

VTX A12 VT GND | Vertical Transporter Ground Stack
VTX A12 VT GND Main photo
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  • Outrigger system for VTX A12 VT, VTX B28 VT and other compatible Vertical Transporters
  • Four screw jacks included for height adjustment
  • Innovative spring-based angle-set mechanism
  • Compact and lightweight design
  • Range: -15 to +5 degree
  • Vertical Transporter not included
(1) VTX A12 VT GND













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