JBL VTX B28
JBL VTX B28
JBL VTX B28
JBL VTX B28

JBL VTX B28

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.

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Product details

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Features

  • 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
Technical Specifications


TECHNICAL SPECIFICATIONS
SYSTEM
Frequency Range (-10 dB) : 25 Hz - 80 Hz (Preset: VTX B28 80)
Coverage Pattern Options1 : Omnidirectional or Cardioid
System Input Power Rating2 : 2600W Continuous (IEC/100 hour)
Maximum Peak Output3 : 141 dB (Preset: VTX B28 80)
System Amplification : Crown I-Tech 12000HD
Crown I-Tech 4x3500HD
Required Amplifier Channels: (1) channel (SUB)
Number of Cabinets per Amplifier
IT-12000HD :
IT-4x3500HD4 :
(2) VTX B28
(2) VTX B28
System Impedance5 : 4 ohms
TRANSDUCERS
Low Frequency : (2) JBL 2288H-M, 18 in diameter, dual 4 in diameter voice coil, Neodymium Differential Drive
ENCLOSURE
Construction : 18 mm 13-ply and 12 mm 9-ply Finnish birch plywood, Black DuraFlexTM finish, four integral recessed handles
IP Rating6
: IP55 (IEC 60529)
Suspension : High-grade steel with anti-corrosion coating, captive suspension plates, captive pins, spring-loaded mechanism, two-step safety lock
Grill : Powder coated 1.8 mm (14-guage) hex-perforated stainless steel with acoustically transparent black cloth
backing
Connectors
Type :
Pin Assignments :
Neutrik® speakON® NL4 (one at the rear and one at the front)
Pins 1 ± active | Pins 2 ± not connected
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)
Footnotes:
1: Based on speaker preset selection and cabinet orientation/configuration.
2: IEC Standard: IEC shaped noise with 6 dB crest factor based on nominal impedance and a duration of 100 hours. Continuous is defined as 2x RMS.
3: Peak, unweighted SPL, measured under half-space conditions at 1 meter using broadband pink noise with a 12 dB crest factor and specified preset.
4: For more information on how to power B28 subwoofers using I-Tech 4x3500HD amplifiers refer to the VTX B28 User Manual.
5: Nominal impedance within the stated frequency range of the product. Minimum impedance is 5.6Ω at 150 Hz.
6: Front face at 0 degrees or greater down angle to allow the cabinet to drain water. Suspension components fully weather rated for indoor or covered outdoor conditions where humidity is nominally under 50% and not local
to bodies of corrosive materials. Unused speakON connectors must be sealed using silicone to protect against water and moisture.
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.