JBL PRX418S
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Essential Information About the JBL PRX418S Subwoofer
Essential Information About the JBL PRX418S Subwoofer
- Powerful and precise bass thanks to an 18-inch (46 cm) loudspeaker, designed for linear response in sound reinforcement.
- Compact and easy-to-integrate format, with a 35 mm pole socket to mount a satellite speaker (PRX412M or PRX415M) directly on top.
- Robust design for touring and installation : steel grille, 18 mm plywood enclosure, and DuraFlex finish.
- Versatile passive platform : ideal for both mobile sound and fixed installation, with suitable amplification and processing.
Manufacturer Information
JBL
https://www.jbl.com
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PRX400: JBL's Approach to Accessible and High-Performance Passive Sound Reinforcement
The PRX418S is part of the PRX400 series, a range of passive speakers designed to offer an excellent balance of power, linearity, and reasonable budget. The idea is simple: to provide a solid foundation for building a reliable sound reinforcement system capable of covering various contexts (live music, club playback, retail, mobile performances), while maintaining natural sound reproduction and good intelligibility.
Within this range, the PRX418S serves as the system's foundation: paired with compatible satellites, the setup is rated to reach 135 dB at 1 m in system configuration, while maintaining controlled frequency response.
Who Is It For and What Are Its Uses? A Subwoofer Designed to "Support" a System
The JBL PRX418S is aimed at users who want to extend the low end of a passive system without complicating setup. In mobile sound, it provides the essential foundation for kick drums, bass guitars, and synths, while freeing satellite speakers from the most demanding frequencies. In fixed installation, it allows for building a more balanced sound distribution, with present yet clean bass even at sustained levels.
The 35 mm pole socket is a real advantage for saving time on site: you mount a speaker on top of the sub, reduce floor footprint, and achieve more coherent projection. The PRX418S supports both simple configurations (powered mixer) and full racks with amplifier and processor, depending on the desired tuning precision.
Design, Components, and Key Points for Professional Use
An 18-Inch Driver Designed for Useful Bass
The PRX418S features a JBL Selenium SWS1000W 457 mm (18-inch) driver, a size favored for delivering ample front bass while maintaining control. Its specified frequency response extends down to 35 Hz (-10 dB, EQ flat), effectively reinforcing the low end of the mix without artificially boosting the low-mids.
A Passive Architecture That Rewards Good Amplification
With a nominal impedance of 8 ohms and a rated continuous power handling of up to 800 W, this subwoofer is designed to operate with serious amplification. The PRX400 series is also designed for quick deployment with amplifiers that include processing (filtering, limiting) to optimize multi-way configurations and protect the system at high levels.
Reliability on Stage and in Installation
The 18 mm plywood enclosure enhances mechanical rigidity and limits unwanted vibrations. The steel grille protects the driver during repeated loading, and the DuraFlex finish is suited to the demands of live performance. For fixed installation, the presence of M10 suspension points facilitates integration while maintaining a solid, professional approach.
Technical specifications
| Bluetooth | No | ||
| Type | 18-inch subwoofer | Protective grille | steel |
| Components | 1 x JBL Selenium SWS1000W 457 mm (18-inch) | Finish | DuraFlex |
| Frequency response | 35 Hz - 250 Hz (-10 dB, EQ flat) | Suspension points | M10 |
| Sensitivity | 95 dB, 1W/1m | Connectors | 2 x Neutrik Combo Speakon NL2 / Jack |
| Max SPL | 124 dB SPL max | Socket | 35 mm for satellite pole |
| Nominal impedance | 8 ohms | Dimensions | 536 x 615 x 678 mm |
| Amplification power | 800 W continuous | Weight | 36 kg |
| Enclosure | 18 mm plywood | ||
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Questions frequently asked
Which amplification should be chosen for the JBL PRX418S?
With a nominal impedance of 8 ohms, this subwoofer accepts a rated amplification power of 1600 W program. An amplifier equipped with filtering and limiting helps optimize a multi-way setup.
Does the bass go low enough for kick drums and bass lines?
The specified frequency response ranges from 35 Hz to 250 Hz at -10 dB, with flat equalization. The 457 mm JBL Selenium SWS1000W driver reinforces kick drums, bass lines, and synths.
What connections are available on this passive subwoofer?
Two Neutrik Combo connectors accept Speakon NL2 or jack plugs.
Can a satellite speaker be mounted on top of the subwoofer?
The 35 mm socket allows installation of a satellite speaker on a pole above the cabinet. This arrangement reduces floor space and positions the sound output at a higher level.
Is the cabinet suitable for mobile performances and fixed installations?
The enclosure is made of 18 mm plywood, with a steel grille and a DuraFlex finish designed for repeated handling. M10 suspension points are provided for fixed installation. Its dimensions are 536 x 615 x 678 mm with a weight of 36 kg.
