The JBL SRX818SP 18-Inch Powered Subwoofer is a professional, high-output bass-reflex subwoofer designed for live sound reinforcement, mobile DJs, touring productions, rental systems, and permanent installations. Part of JBL's SRX800 Series, this self-powered subwoofer combines a premium 18-inch JBL Differential Drive® woofer, integrated 1,000-watt peak Crown amplification, and advanced digital signal processing (DSP) to deliver powerful, controlled low-frequency performance.
With a maximum output of 135 dB SPL, a frequency range of 29 Hz–150 Hz (–10 dB), and a frequency response of 35 Hz–120 Hz (–3 dB), the SRX818SP provides the deep bass and impact required for demanding professional audio applications.
The SRX818SP also features HiQnet network control, JBL-engineered application presets, and an integrated LCD display, giving audio professionals convenient control over system tuning and configuration. Its rugged plywood enclosure with a durable DuraFlex finish is built for repeated transport and professional use.
Powerful Bass with Crown DriveCore Amplification
The JBL SRX818SP features an 18-inch Differential Drive woofer designed to reproduce low frequencies with high output and controlled distortion.
Its integrated 1,000-watt peak Class D amplifier incorporates Crown DriveCore technology, eliminating the need for an external power amplifier while delivering dependable bass reinforcement for live performances and DJ systems.
The powered design also simplifies system setup when paired with compatible JBL SRX800 Series full-range loudspeakers.
Advanced DSP and Network Control
The SRX818SP includes an onboard 400 MHz SHARC DSP processor with professional audio processing capabilities.
- 20 parametric EQ filters for system tuning
- Speaker delay for time alignment
- 50 user preset locations
- JBL-engineered application presets
- Input mixing and amplifier monitoring
- HiQnet network control for compatible control systems
- Integrated LCD screen for local configuration
These controls help installers and sound engineers optimize subwoofer performance for different venues, system configurations, and acoustic environments.
JBL SRX818SP Key Features
- Professional 18-inch self-powered bass-reflex subwoofer
- 1,000W peak Crown Class D amplification
- Premium JBL Differential Drive low-frequency transducer
- Maximum output of 135 dB SPL at 1 meter
- Frequency response of 35 Hz–120 Hz (–3 dB)
- Extended frequency range of 29 Hz–150 Hz (–10 dB)
- Advanced onboard DSP with 20 parametric EQ filters
- 50 user presets and JBL application tunings
- HiQnet network control capabilities
- Integrated LCD display for system setup
- Durable 18 mm plywood enclosure with DuraFlex finish
- Professional audio inputs and dual XLR outputs
- M20 threaded pole-mount receptacle
- Designed for portable and installed professional sound systems
JBL SRX818SP Technical Specifications
| Specification | Details |
|---|
| Manufacturer | JBL Professional |
| Model | SRX818SP |
| Product Series | SRX800 |
| System Type | 18" Self-Powered Bass-Reflex Subwoofer |
| Amplifier Power | 1,000W Peak |
| Amplifier Design | Class D with Crown DriveCore Technology |
| Maximum SPL (1m) | 135 dB |
| Frequency Range (–10 dB) | 29 Hz–150 Hz |
| Frequency Response (–3 dB) | 35 Hz–120 Hz |
| Low-Frequency Driver | 1 × 18" JBL Differential Drive Woofer |
| DSP | Integrated Digital Signal Processing |
| Equalization | 20 Parametric EQ Filters |
| Speaker Delay | User-Configurable |
| User Presets | 50 |
| Inputs | Neutrik Combination ¼" / XLR |
| Outputs | 2 × XLR |
| Enclosure | 18 mm DuraFlex-Coated Plywood |
| Pole Mount | M20 Threaded Receptacle |
| Dimensions (H × W × D) | 26.89" × 26.92" × 22.62" (683 × 684 × 575 mm) |
| Net Weight | 87 lbs (39.5 kg) |
Ideal Applications
- Live Music and Concerts: Adds powerful low-frequency reinforcement to professional PA systems.
- Mobile and Fixed DJ Systems: Delivers deep bass for dance music, receptions, and entertainment venues.
- Rental and Touring Systems: Provides rugged construction and flexible DSP control for changing venues.
- Houses of Worship: Supports music reinforcement in appropriately designed sound systems.
- Permanent Installations: Integrates with compatible JBL loudspeakers for commercial and performance venues.
Need a Compatible JBL Powered Loudspeaker?
The JBL SRX835P 15-Inch 3-Way Powered Loudspeaker is an excellent companion to the SRX818SP for building a professional SRX800 Series sound system.
Combining the SRX835P's full-range performance with the SRX818SP's dedicated low-frequency output provides a versatile solution for live performances, DJ systems, and larger sound reinforcement applications.
Why Buy the JBL SRX818SP from Audio Supply?
Audio Supply offers JBL Professional powered speakers, subwoofers, and sound reinforcement equipment for live entertainment, touring, commercial AV, and permanent installations.
Whether you're expanding an existing JBL SRX800 system or building a new professional PA setup, Audio Supply can help you find compatible equipment for your application.
