Dual 18” Subwoofer

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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


  Version Language Size Uploaded
VTX B28 Spec Sheet
en updated: Aug 11, 2020
  en  368 KB Aug 11, 2020
CAD Drawings
VTX B28 Customer Drawings
updated: Jul 28, 2020
    1.1 MB Jul 28, 2020
VTX B28 & Accessories Sketchup Files
version 1.0, updated: Oct 22, 2020
1.0    1.18 MB Oct 22, 2020
VTX B28 & Accessories Revit Files
version 1.0, updated: Oct 22, 2020
1.0    5.71 MB Oct 22, 2020
VTX B28 & Accessories Archicad Files
version 1.0, updated: Oct 22, 2020
1.0    1.44 MB Oct 22, 2020
Line Array Calculator III
version 3.5.0, updated: Aug 17, 2020
3.5.0     12.5 MB Aug 17, 2020
version 2.7.0, updated: Aug 17, 2020
2.7.0     108 MB Aug 17, 2020
Owner's Manuals
VTX B28 User Manual
en updated: Aug 17, 2020
  en  7.99 MB Aug 17, 2020
VTX B28 Rigging Manual
en updated: Jul 28, 2020
  en  14.7 MB Jul 28, 2020
Ease Data
updated: Aug 17, 2020
    1.28 MB Aug 17, 2020
Preset Libraries
VTX B28 Preset Library
version 1.0.0, updated: Aug 17, 2020
1.0.0    576 KB Aug 17, 2020

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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 12000HD
Crown Audio I-Tech 4x3500HD
IP Rating IP55 (IEC 60529)
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)
System Impedance 4 ohms
LF Driver 2 x JBL 2288H-M, 18in diameter, dual 4in diameter voice coil, neodymium Differential Drive
Enclosure 18mm and 15mm,11-ply exterior grade Baltic birch plywood, Black DuraFlexTM finish, integral recessed handles
Suspension / Mounting Captive suspension plates, captive pins, spring-loaded mechanism, 2-step safety lock


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

VTX A12 BP | Base Plate for VTX A12
VTX A12 BP Main photo
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  • 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


  • (2) VTX A12 BP Base Plate (Left / Right)

VTX A8 BP | Base Plate
VTX A8 BP Main photo
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  • Used for ground stacking VTX A8
  • Connects VTX A8 cabinets to subwoofers
  • Universal M20 attachment method
  • Range: -15° to +5°
  • Lightweight design


  • (1) VTX A8 BP Base Plate
  • (4) Stabilization feet for the B18

VTX V20 BP | Base Plate for VTX V20
VTX V20 BP Main photo
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  • Enables ground stacking VTX V20 arrays
  • Allows attaching VTX V20 cabinets to subwoofers
  • Universal M20 threaded pole mount
  • Array angles selectable between -15 degrees and -2.5 degrees
  • Lightweight design
  • Support for up to (6) VTX V20


  • (1) VTX V20 BP Base Plate