JBL PRX418S 18" Passive Subwoofer

The JBL PRX418S is a professional 18-inch passive subwoofer designed to add powerful low-frequency reinforcement to live sound, PA, DJ, music playback, and portable sound systems. With an 800-watt continuous power rating, 1600-watt program capacity, and 8-ohm nominal impedance, the PRX418S provides substantial bass output from a durable, transportable enclosure.

The PRX418S features an 18-inch JBL Selenium low-frequency driver in a front-loaded, vented enclosure. Its 52 Hz–120 Hz frequency response and maximum peak SPL of 130 dB make it well suited for extending the low-frequency performance of full-range loudspeakers in professional sound reinforcement systems.

A built-in pole-mount socket allows a compatible full-range speaker to be mounted above the subwoofer, while integrated handles make the PRX418S easier to transport between venues and events.

18-Inch JBL Selenium Woofer

At the heart of the PRX418S is an 18-inch JBL Selenium low-frequency driver designed for high-output bass reproduction.

The woofer is housed in a front-loaded, vented enclosure with a large vent area designed to support efficient low-frequency output while reducing unwanted port distortion.

With a system frequency range extending from 35 Hz to 300 Hz, the PRX418S adds the low-frequency impact needed for music playback and live sound applications where full-range speakers alone may not provide sufficient bass extension.

800W Continuous / 1600W Program Power

The JBL PRX418S is rated for:

• 800 watts continuous
• 1600 watts program
• 3200 watts peak

With a 95 dB sensitivity rating and maximum peak output of 130 dB SPL, the PRX418S is designed for professional sound systems requiring substantial low-frequency output.

Because the PRX418S is a passive subwoofer, it requires an external power amplifier. Proper amplifier selection and system processing are important for achieving the desired output while protecting the loudspeaker.

Designed for Subwoofer/Satellite Systems

The PRX418S can be combined with compatible JBL full-range loudspeakers to create a subwoofer/satellite PA system for music and sound reinforcement.

Its integrated pole-mount socket allows a compatible full-range loudspeaker to be positioned above the subwoofer using an appropriate speaker pole, helping create a compact system for mobile DJs, bands, live events, and portable PA applications.

For larger systems, multiple PRX418S subwoofers can be incorporated as required by the system design and amplifier configuration.

Rugged Wood Enclosure with DuraFlex Finish

The PRX418S uses a birch/poplar multi-laminate hardwood enclosure designed to withstand the demands of professional transport and live sound use.

JBL's durable DuraFlex finish helps protect the cabinet during regular setup, teardown, and transportation.

The 18-inch driver is protected by a heavy-duty 16-gauge steel grille, while strategically positioned carrying handles assist with moving and positioning the 79 lb enclosure.

JBL PRX418S Key Features

• Professional 18-inch passive subwoofer
• JBL Selenium 18-inch low-frequency driver
• Front-loaded, vented enclosure
• 800W continuous power handling
• 1600W program power
• 3200W peak power
• 95 dB sensitivity
• Maximum output of 130 dB SPL peak
• 8-ohm nominal impedance
• 35 Hz–300 Hz system frequency range
• 52 Hz–120 Hz frequency response
• Large vent area designed to reduce port distortion
• Birch/poplar multi-laminate hardwood enclosure
• Durable JBL DuraFlex finish
• Heavy-duty 16-gauge steel protective grille
• Integrated speaker pole-mount socket
• Integrated carrying handles
• Designed for professional live sound and PA systems

JBL PRX418S Specifications

Ideal Applications

The JBL PRX418S is well suited for:

• Live music and bands
• Mobile DJ systems
• Portable PA systems
• Clubs and entertainment venues
• Event production
• Houses of worship
• Music playback systems
• Stage sound reinforcement
• Subwoofer/satellite speaker systems

Why Choose the JBL PRX418S?

The JBL PRX418S is a practical choice for sound systems requiring a high-output passive 18-inch subwoofer without the electronics of a powered enclosure.

Its combination of an 800W continuous power rating, 8-ohm impedance, 130 dB peak output, rugged wood enclosure, integrated pole mount, and transport handles makes it particularly useful for portable and installed professional sound systems.

Because it is passive, the PRX418S also gives system designers flexibility in choosing the external amplifier and processing appropriate for the installation.

Why Buy the JBL PRX418S from Audio Supply?

Audio Supply provides professional JBL loudspeakers, subwoofers, power amplifiers, speaker poles, cables, and sound system accessories for portable and installed audio systems.

If you're building a system around the JBL PRX418S, our team can help with amplifier selection, speaker matching, cabling, system processing, and related accessories.