Dual 18-inch Powered Subwoofer

Larger Images

Dual 18-inch Powered Subwoofer
The SRX900 Series embodies the advanced performance principles that drive JBL's development of audio products that make a real difference in the world of professional audio. This next-generation family of powered line arrays and subwoofers addresses the growing need for scalable small and medium-format professional sound-reinforcement solutions for rental companies, fixed installations and musicians seeking the ultimate combination of performance and portability.

The SRX928S is a dual 18-inch active subwoofer designed to complement SRX900 full-range sound reinforcement systems. The sub¬woofer houses two JBL 2279-1 18-inch woofers, featuring Differential Drive® – JBL’s dual voice coil, dual gap technology – to deliver better heat dissipation, lower power compression, and wider dynamic range than conventional single-coil designs.

Built-in DSP and amplification offer a plug and play experience, while providing consistency and optimum performance anywhere in the world. The SRX928S incorporates a large central low frequency port design that improves airflow and reduces audible turbulence, even at high output levels. A new, full-featured software package gives users control of the system on various platforms, including Windows, macOS, and iPad OS. Learn more about JBL Performance here.


  • High-performance, high-density system solution in a truck-pack friendly format
  • High-power-handling transducers deliver low distortion, high fidelity, and class-leading output
  • Built-in, passively cooled Class D amplification with a universal power supply
  • Dual Ethernet ports with Neutrik etherCON connectors
  • Supports HARMAN HControl Ethernet
  • User-controllable DSP
  • LevelMax limiting uses sophisticated excursion-control algorithms to protect transducers
  • Rear-panel LCD provides complete access to control features
  • Reinforced 18mm plywood enclosures


  Version Language Size Uploaded
file type icon SRX928S Spec Sheet
en version A, updated: May 2022
en  428 KB May 2022
file type icon SRX900 Series User Manual
en version B, updated: Mar 2023
en  9.32 MB Mar 2023
file type icon SRX900 Series Rigging Manual
en version C, updated: Mar 2023
en  38.5 MB Mar 2023
file type icon Assembly Instructions - powerCON TRUE1 TOP
en version V3, updated: Mar 2023
V3  en  5.18 MB Mar 2023
CAD Drawings
file type icon SRX928S Customer Drawings
en version A, updated: May 2022
en  7.63 MB May 2022
file type icon SRX900 Series Revit Files
version 1.0, updated: May 2022
1.0    43.1 MB May 2022
file type icon SRX900 Series Sketchup Files
version 1.0, updated: May 2022
1.0    2.67 MB May 2022
platform icon Performance Software (MAC)
version 1.2.0, updated: Jan 2023
1.2.0     35.6 MB Jan 2023
platform icon Performance Software (Windows)
version 1.2.0, updated: Jan 2023
1.2.0     85.4 MB Jan 2023
platform icon Line Array Calculator III
version, updated: Oct 2022     24.2 MB Oct 2022
platform icon Performance Software (iPadOS)
updated: Aug 2022
    Aug 2022
file type icon SRX900 Series Firmware Changelog
en version, updated: Jan 2023  en  52.6 KB Jan 2023
Declaration Of Conformities
file type icon SRX900 Series EU Declaration of Conformity
en version A, updated: Jul 2022
en  1010 KB Jul 2022
Ease Data
file type icon SRX900 Series EASE GLL
version 1.0, updated: Jul 2022
1.0    14 MB Jul 2022

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) 31 Hz-100 Hz (Preset: 80 Hz)
Coverage Pattern Omnidirectional or Cardioid
Maximum SPL 140 dB (Preset: 80 Hz)
System Type Active Subwoofer
Amplifier Design Class-D
Continuous Power Rating 1,100 Watts
LF Driver (2) JBL 2279H-1, 18 in diameter, 8 ohms, dual 3.0 in diameter voice coil, ferrite Differential Drive®
Enclosure 18 mm plywood, Black DuraFlex finish, four integral recessed handles
Dimensions (H x W x D) 565 mm x 1,205 mm x 681 mm
(22.2 in x 47.4 in x 26.8 in)
Net Weight (each) 70.3 kg (155 lbs)


SRX928S CVR | Accessory Cover Kit for SRX928S
SRX928S CVR Main photo
Larger Images


  • Heavy-duty soft cover for SRX928S subwoofer
  • Handle cutouts for easy transportation
  • Includes folding feature for storage
  • Internally reinforced for grille protection


  • (1) Cover

SRX900 RC1 | Rain Cover, compatible with all SRX900 models
SRX900 RC1 Main photo
Larger Images


  • Universal rain cover for SRX900 products
  • Supports: SRX906LA, SRX910LA, SRX918S, SRX928S
  • Flexible material for conforming to cables
  • Covers LCD, audio, and data connections
  • Unfolds for easy cable and LCD access
  • Designed to remain attached


  • (1) Rain Cover
  • (5) T15 M3.5 Screws

ACK1 | Accessory Caster Kit
ACK1 Main photo
Larger Images


  • Universal caster kit for JBL products
  • Compatible with SRX918S and SRX928S
  • Black housing for discreet look
  • Black polyurethane wheel
  • Anti-rattle features for vibration-free operation


  • (4) Casters + Installation Hardware













HARMAN Professional Solutions: