The SRX928S is a dual 18-inch powered subwoofer designed for integration with SRX900 full-range sound reinforcement systems. It features two JBL 2279-1 18-inch woofers employing Differential Drive technology, which uses dual voice coils and dual gaps to enhance heat dissipation, reduce power compression, and increase dynamic range compared to traditional single-coil designs. The subwoofer includes a built-in digital signal processor (DSP) and amplification, enabling simplified setup and consistent performance across different environments.

The cabinet incorporates a large central low-frequency port that improves airflow and minimizes audible turbulence at high output levels. Control of the system is managed through dedicated software compatible with Windows, macOS, and iPad OS platforms, allowing for precise system configuration and tuning.

• High-density system in truck-pack format
• High-power transducers with low distortion and high fidelity
• Passively cooled Class D amplification with universal power supply
• Dual Ethernet ports with Neutrik etherCON connectors
• Supports HARMAN HControl Ethernet
• User-controllable DSP
• LevelMax limiting with excursion-control algorithms
• Rear-panel LCD for control access
• Reinforced 18mm plywood enclosures

Frequency Range	31 Hz - 100 Hz
Coverage Pattern	Omnidirectional or Cardioid
Maximum SPL	140 dB
System Type	Powered Subwoofer
Amplifier Design	Class-D
Continuous Power Rating	1100 W
LF Driver	(2) JBL 2279H-1, 18 in diameter, 8 ohms, dual 3.0 in diameter voice coil, ferrite Differential Drive
Enclosure	Plywood, Black DuraFlex finish, four integral recessed handles