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JBL PRX818XLF Built-in Wi-Fi - Image

Built-in Wi-Fi

For wireless control of your system from anywhere in the venue

JBL PRX818XLF Free PRX Connect mobile app for iOS and Android - Image

Free PRX Connect mobile app for iOS and Android

Provides wireless control over volume levels, 8-band parametric EQ and up to 50ms of speaker delay to fine-tune your sound

JBL PRX818XLF Class-leading 1500-watt amplifier - Image

Class-leading 1500-watt amplifier

Delivers ample power to fill your venue


JBL PRX818XLF JBL Differential Drive® transducers - Image

JBL Differential Drive® transducers

For higher SPL in a lightweight design

JBL PRX818XLF Crown-designed input panel - Image

Crown-designed input panel

With XLR, 1/4”, and RCA inputs, plus XLR loop-through

JBL PRX818XLF Durable construction - Image

Durable construction

Wooden cabinets, tour-proven DuraFlex™ finish, and dent-resistant cloth-backed 16-gauge grilles

JBL PRX818XLF Universal power supply - Image

Universal power supply

For worldwide compatibility

JBL PRX818XLF Demanding 100-hour test regimen - Image

Demanding 100-hour test regimen

Ensures reliable performance

JBL PRX818XLF Intelligent variable-speed fan - Image

Intelligent variable-speed fan

Activates only when needed to reduce noise

JBL PRX818XLF Scalable system - Image

Scalable system

Integrates with other JBL portable powered PA's

Frequently Bought Together

Specs & Downloads

Item# PRX818XLFW


Loudest-in-class Sound Reinforcement System with easy Wi-Fi Control

The JBL PRX818XLF is a self-powered extended low-frequency subwoofer system designed and engineered to provide sub bass frequencies with accuracy and power. Featuring a JBL 18-inch woofer powered by a 1500-watt class-D amplifier, PRX818XLF delivers incredible output in a lightweight and compact form factor. Used as a single sub in a sub/ sat system or in multiples as part of a scalable, large format sound reinforcement system, the PRX815XLF performs with exceptional efficiency and control. The subs are stackable and light-weight, ensuring quick set-ups and tear-downs. With the integrated stereo pass-thru this is the most powerful low-frequency complement to the PRX full-range systems. The addition of a polarity reverse option further enables system optimization. PRX800 subwoofers feature a standard M20 threaded pole cup that can accept most modern subwoofer-mounted speaker poles. The PRX800 series integrates embedded ioSYS technology which enables easier setup and control when used with the HARMAN Connected PA app and compatible products. Connected PA delivers seamless plug-and-play operation with a variety of HARMAN equipment and enables you to control your entire live sound system with one app. Products within the Connected PA system self-identify and retain presets for effortless setup, and setup wizards help you quickly optimize speaker levels, configuration settings and EQ. Current products with embedded ioSYS technology and HARMAN Connected PA compatibility include the Ui24R mixer, JBL PRX800 loudspeakers, dbx Di1 direct boxes, and AKG P5i microphones and the MDAi dynamic microphone adapter.

General Specifications

Power Rating (W, Continuous)
Power Rating (W, Peak)
Frequency Response Hz (±3 dB)
35 - 87
Maximum SPL (peak dB)


Height (in)
Depth (in)
Width (in)
Weight (lbs)
Height (mm)
Width (mm)
Depth (mm)
Weight (kg)


Obsidian DuraFlex™ finish


Single-angle top pole-mount socket
Built-in Wi-Fi
Mobile app available for iOS and Android
Transducer Differential Drive JBL

Documents & Downloads

Reviews and Q&A

Customer Reviews

Rated 1 out of 5 by from Under powered I'm really bummed with this purchase. Maybe I I expected more from this sub but it is so under powered it sucks. You have to have the gain on max to even get a response. I wouldn't recommend this sub.
Date published: 2019-11-03
Rated 5 out of 5 by from Wifi control It was clear asfff but it wasn't that loud for the price JBL
Date published: 2019-12-04
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Product Q&A

Why do you offer Q&A, if you're just going to tell everyone to contact customer service, my question was simple, is there a built in crossover or do you recommend an external crossover.

Asked by: Jeremiah 1
Hello again Jeremiah. To follow up, the PRX818XLF is designed to be used with tops from the PRX800 family. If you are using other PRX800 speakers the need for a separate crossover is not necessary. If you are using the PRX818XLF with speakers from another brand, then you may find a crossover helpful.
Answered by: HARMAN Adviser
Date published: 2021-06-06

how to made for best sound eq dsp for djs?

Asked by: rosh boy
Thank you for your question. You might find the answer to your question in our Product Support FAQ and knowledge base sections: https://www.harmanaudio.com/support-knowledgebase.html.To submit a support case, please fill out he Contact Us form at the same location. Thank you
Answered by: Meriam
Date published: 2021-06-06

When will you guys have these in stock again?

Asked by: JBLnumber1
Our JBL PRX818XLF is handled by our Professional Division. Please contact them for assistance in checking the availability of the speaker: https://jblpro.com/support/tech_support?geo=us
Answered by: Customer Support
Date published: 2021-12-08

Should I use a crossover

Asked by: Jeremiah 1
For inquiries regarding this professional product, you may call Harman Pro at 844-776-489 or send an email to HProTechSupportUSA@harman.com. Monday to Friday, 9 am to 6 pm (EST)
Answered by: Jem at Customer Support
Date published: 2021-06-06

If this is supposed to be a 1500 amplifier, why does the back panel state 300w?

Asked by: Director Jeff
Probably the unit is 300 watts rms (continuous power) Do not pay attention to the total watts of output as advertised. That is for short burst of power for just about 2 to 3 seconds. The total watts means nothing. Look only at the RMS rating. It is the only thing that matters.
Answered by: Anonymous
Date published: 2021-06-06

Is there any information on how best to utilize the 818 in a single subwoofer setup.  There is no information int he manuals or other guides.

Asked by: scott2002
We would like to work with you directly to help you with your issue. Please submit a case request at http://www.jblproservice.com/forms/marcom.html and the Customer Service Team will be more than happy to assist you.
Answered by: Steve S
Date published: 2021-06-06
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