The JBL SRX918S is a next‑generation, single 18‑inch powered subwoofer engineered to deliver deep, powerful low‑frequency performance for professional sound companies, touring artists, DJs, and fixed installations. As part of the advanced JBL SRX900 Series, this active subwoofer integrates seamlessly with SRX900 full‑range line array systems, providing scalable, high‑output low‑end reinforcement for small to large‑format applications.

At the heart of the SRX918S is the JBL 2279‑1 18" Differential Drive® woofer, featuring dual voice coils and dual gaps for superior heat dissipation, reduced power compression, and extended dynamic range. A large, optimized low‑frequency port design ensures smooth airflow and reduced turbulence, even at maximum output levels.

With built‑in Class‑D amplification, universal power supply, LevelMax limiting, and full DSP control via JBL Performance software, the SRX918S delivers a true plug‑and‑play professional subwoofer solution that performs consistently in any environment.

📌 Technical Specifications

• Frequency Range (‑10 dB): 35 Hz – 90 Hz

• Coverage Pattern: Omnidirectional or Cardioid

• Maximum SPL: 134 dB

• System Type: Active subwoofer

• Amplifier Design: Class‑D

• Continuous Power Rating: 1,100W

• LF Driver: (1) JBL 2279G‑1, 18", 4‑ohm, dual 3" voice coils, Differential Drive®

• Enclosure: 18mm plywood, Black DuraFlex finish, two recessed handles

• Dimensions (H × W × D): 22.6" × 26.9" × 26.9" (575 × 684 × 683 mm)

• Net Weight: 98 lbs (44.5 kg)