JBL SRX918SF 18-inch Subwoofer

JBL SRX918SF 18-inch Powered Subwoofer

The SRX918SF is a heavyweight subwoofer engineered for large-scale sound reinforcement applications where deep low-end extension and controlled directivity are non-negotiable. This is a purpose-built tool for touring sound engineers, installed systems designers, and rental companies that demand consistent, articulate bass reproduction in venues ranging from mid-sized clubs to outdoor festivals.

Acoustic Performance

The 18-inch dual voice-coil driver paired with a 2,500-watt Class D amplifier delivers a linear frequency response down to 35Hz and maximum output of 134dB SPL. This combination produces the authoritative bottom end and dynamic headroom necessary for demanding live sound mixing without compression artifacts or distortion.

Design & Deployment

Built from 18mm reinforced birch plywood and equipped with an integrated three-point rigging system, the cabinet handles both ground-stacked and suspended configurations. Dual etherCON Ethernet ports enable networked control and real-time DSP adjustment across multiple units in complex system topologies.

Key Features

• 18-inch JBL 2279G-1 driver with Differential Drive technology and dual 3-inch voice coils
• 2,500-watt Class D amplifier
• 35Hz linear frequency response
• 134dB maximum SPL output
• LevelMax limiting and 24 user-adjustable DSP filters
• 2,000ms signal delay for phase-aligned multi-unit arrays
• Array Size Compensation and FIR-based Throw Distance Correction
• 18mm reinforced birch plywood cabinet construction
• Integrated three-point rigging system for suspended or ground-stacked deployment
• Dual etherCON Ethernet ports for networked control
• Universal power supply
• 4-ohm driver impedance

The SRX918SF combines raw output capability with sophisticated onboard DSP processing and flexible rigging options, making it a reliable workhorse for professional sound systems.