The JBL PRX918XLF is a professional 18-inch powered subwoofer designed to deliver deep, powerful bass for live sound reinforcement, DJ performances, houses of worship, and commercial audio systems. Part of JBL's PRX900 Series, the PRX918XLF combines a high-performance 18-inch woofer, 2,000-watt peak Class-D amplification, and advanced dbx digital signal processing in a durable, road-ready enclosure.
Engineered for demanding professional applications, the PRX918XLF delivers low-frequency extension down to 30 Hz and a maximum output of 134 dB SPL. Its JBL 918SG woofer and specially designed flared bass-reflex port work together to produce tight, defined bass while reducing unwanted port noise and distortion.
Unlike conventional powered subwoofers with limited adjustment options, the PRX918XLF includes advanced DSP with a 6-band parametric EQ, selectable crossover frequencies, and speaker delay. These features allow installers and sound engineers to optimize bass performance and integrate the subwoofer with compatible full-range loudspeakers.
The PRX918XLF also features JBL Pro Connect wireless control, allowing users to adjust supported DSP functions from a compatible mobile device. Its rugged 18 mm birch plywood cabinet, protective DuraFlex finish, integrated carrying handles, and M20 pole-mount socket make it suitable for portable and installed sound systems.
JBL PRX918XLF Key Features
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18-inch powered subwoofer designed for professional sound reinforcement
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2,000W peak / 1,000W RMS Class-D amplifier for high-output bass performance
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JBL 918SG ferrite woofer for powerful, controlled low-frequency reproduction
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134 dB maximum SPL for demanding live sound applications
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30 Hz–110 Hz frequency range (-10 dB) for extended bass response
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Flared bass-reflex port designed to reduce air noise and distortion
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Integrated dbx DriveRack DSP for advanced sound optimization
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6-band parametric EQ for precise low-frequency adjustments
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Selectable 80 Hz, 100 Hz, and 120 Hz crossover settings
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Adjustable speaker delay for time alignment with full-range loudspeakers
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JBL Pro Connect app for wireless DSP control via Bluetooth Low Energy
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Onboard color LCD display for convenient system configuration
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Two XLR/¼-inch combination inputs and two XLR pass-through outputs
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Fanless cooling design for quiet operation
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18 mm birch plywood enclosure with durable protective finish
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Integrated side handles for easier transportation
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M20 threaded pole-mount socket for compatible speaker poles
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7-year JBL manufacturer warranty, subject to warranty terms
Powerful Bass for Live Sound and DJ Systems
The JBL PRX918XLF is engineered to reproduce the low frequencies that give live music, electronic music, and sound reinforcement systems their impact.
Its 18-inch woofer provides deep bass reproduction for kick drums, bass guitars, electronic music, and other low-frequency program material. The high-efficiency Class-D amplifier delivers the output needed for professional performances, while integrated DSP helps maintain controlled and consistent sound.
The PRX918XLF can be used individually or as part of a larger sound system with multiple subwoofers and full-range loudspeakers.
Advanced DSP and JBL Pro Connect Control
The PRX918XLF incorporates dbx DriveRack processing tools that allow users to tailor low-frequency performance to different venues and system configurations.
The 6-band parametric EQ provides detailed tonal control, while selectable crossover settings help match the subwoofer with compatible main speakers. Adjustable delay supports proper time alignment between subwoofers and full-range loudspeakers.
Using the JBL Pro Connect app, users can remotely access supported system settings and manage compatible JBL loudspeakers from a mobile device.
Ideal Applications
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Live bands and concert performances
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DJ and mobile entertainment systems
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Houses of worship
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Nightclubs and entertainment venues
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Corporate events and presentations
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Rental and production sound systems
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Theaters and auditoriums
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Commercial sound reinforcement installations
JBL PRX918XLF Technical Specifications
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Specification
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Details
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Product type
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Professional powered subwoofer
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Series
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JBL PRX900
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Woofer
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18" JBL 918SG
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Magnet type
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Ferrite
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Amplifier
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Class D
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Amplifier power
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2,000W peak / 1,000W RMS
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Maximum SPL
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134 dB
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Frequency range (-10 dB)
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30 Hz–110 Hz
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Frequency response (-3 dB)
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35 Hz–92 Hz
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Coverage
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Omnidirectional
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Selectable crossover
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80 Hz, 100 Hz, 120 Hz
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DSP
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dbx DriveRack processing
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Equalization
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6-band parametric EQ
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Wireless control
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JBL Pro Connect via Bluetooth Low Energy
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Display
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Onboard color LCD
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Inputs
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2 XLR/¼" combination inputs
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Outputs
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2 XLR pass-through outputs
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Cooling
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Fanless natural convection
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Enclosure
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18 mm birch plywood
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Finish
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DuraFlex protective coating
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Grille
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Powder-coated steel
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Pole mount
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M20 threaded socket
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Handles
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2 integrated side handles
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Dimensions (H × W × D)
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27.3" × 23.3" × 25.7"
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Net weight
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89.7 lb (40.7 kg)
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Warranty
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7 years, subject to JBL warranty terms
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Why Buy the JBL PRX918XLF from Audio Supply?
Audio Supply is a JBL distributor offering professional sound reinforcement equipment for AV contractors, musicians, and commercial installations. We can help you select compatible JBL loudspeakers, subwoofers, and accessories for your system.
Need a Compatible JBL Powered Speaker?
The JBL PRX935 15-Inch Three-Way Powered PA Speaker is an excellent companion to the PRX918XLF for applications requiring detailed vocals, full-range sound reproduction, and powerful bass.
Together, the PRX935 and PRX918XLF provide a versatile professional PA system for live performances, DJs, and commercial audio installations.
Contact Audio Supply for assistance selecting the right PRX900 Series equipment for your application.
