BassPro SL


Powered, 8" (200mm) car audio under seat woofer system

$249.95249.95 each

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Big bass boost from a compact woofer enclosure

The BassPro SL powered woofer fits under the front seat of many vehicles, and supplements a car audio system’s full-range speakers with powerful bass. Its shallow-profile, 8" woofer delivers low-frequency enhancement from a slim-profile enclosure. A crossover control and flexible EQ adjustments let you tune the BassPro SL to your system, your car’s acoustic environment and your listening preferences. The energy-efficient amplifier keeps its cool while powering the woofer. High-pass filters and limiters ensure remarkable performance, and input options increase installation versatility. The BassPro SL delivers a lot of bass, without taking up a lot of space.


General Specifications

Amplifier Power 125W RMS
Fuse 20A
Maximum Current Draw 12A
Quiescent Current Draw less than 800mA
Input Sensitivity 0.2V – 2V Line-Level Input; 2V – 20V High-Level Input

Audio Specifications

Frequency Response 35Hz – 120Hz
Crossover Frequency 50Hz – 120Hz
Crossover Slope 12dB/octave
Bass Boost 0dB to +9dB @ 70Hz


Width 9-7/8"; (250mm)
Length 13-9/16"; (344mm)

Woofer Specifications

Woofer 8"; (200mm)
Click here for a complete list of all specs for this product

Spec Sheet (EN)

English 4 MB
  • 1 powered woofer enclosure
  • 4 mounting screws
  • Owner’s manual

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1 Year

Note: the Warranty Card provided with your JBL product contains the full terms and conditions of your warranty.

Unless a different warranty period is stated in the Warranty Card provided with your JBL product, JBL warrants for a period of 1 year (5 years for any non-powered speakers) from the date of retail purchase by the original end-use purchaser, that this product, when delivered to you in new condition, in original packaging, from a JBL authorized reseller and used in normal conditions, is free from any defects in manufacturing, materials and workmanship. Refer to the Warranty Card provided with your JBL product for specific details including what is not covered along with other terms and conditions.

Call us: 1.800.336.4525

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BassPro SL is rated 4.8 out of 5 by 36.
Rated 5 out of 5 by from WOW! Just installed basspro8 in my 2011 Jeep jk, it is exactly what the system needed! Had to turn the gain back, was rattling my console, had to do some modifying to my front seat to put it under drivers seat , but not much. Absolutely rounded out my sound. Could not be happier. Thank you JBL!!
Date published: 2018-01-11
Rated 5 out of 5 by from Just The Job I replaced the factory sub in my UK spec 2013 Honda CRV EX with this and am so glad i did. Huge upgrade over the so called ''premium'' audio system fitted by the manufacturer. Fits neatly under the front passenger seat, very easy to fit, and lots of adjustment to give you the sound you require. Gives you more than just bass, seems to lift the whole system sound quality. I've also replaced the factory door speakers with JBL GT6 series speakers and now the whole system sounds great. Plenty of punch and lots of detail as well. Highly recommended.
Date published: 2017-12-11
Rated 5 out of 5 by from Install BassPro SL in Toyota Alphard I just bought a new Toyota Alphard. It is already installed by 17 JBL speakers. But, there is no subwoofer. I am interested in installing BassPro SL in my car but I don't think it can be fit under the driver or front passenger seat as the seats are all electric. Do you have a solution? Thank you very much.
Date published: 2017-09-15
Rated 5 out of 5 by from Great sound Hi. I bought the Baspro SL few days ago, I just mount it last Saturday. My car is a sedan, the SL is mounted under the passenger seat. First, I had the impression the base is not loud and clear, I was almost disappointed. But... Then... Surprise! It sounds just great. Is all you need if you don't want to destroy your ears or to play music for the people outside the car. So, I strongly recommend this product, is just awesome and all you need for a loud and clear base in your car. Of course, now I have to change my speakers also, because the Basspro SL is to strong and the original speakers can't handle it :)
Date published: 2017-08-22
Rated 5 out of 5 by from Perfect Clean Bass in compact package I installed this under the passenger seat of My minivan about a month ago and I am impressed. The installation required me to raise it so that it fit above the underseat vents, but it still fit just fine. This little sub is EXACTLY what I was looking for, small hidden and permanent with excellent sound ( i do not like removing subs when I need space for cargo) I have heard better subs, but they are 20 times the size of this and cost more than twice as much. This Sub was not designed to wake up the neighborhood, but you cant beat the BassPro SL for moderate bass enhancement and clarity.
Date published: 2017-08-07
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I have a Jeep and I just installed this woofer on my system. The blue powerlight on this thing stays on even if everything is off. Is that normal?

Asked by: Jeff Powell
Disregard my answer about the blue light... mine did turn off. Just took a couple min. :-/
Answered by: Rob3dr
Date published: 2017-12-02

I would like to know the dimensions please

Asked by: Gregkoul
Hi The dimensions are 344mm x 250mm x 71mm
Answered by: Mogens
Date published: 2017-12-02

Hi, I'm planning in installing a JBL GTR-104 and running a cable from the pre-out to the sub. I want to know if the BassPro SL will be able to filter-out the higher frequencies as I suppose the amp will transmit the whole frequency spectrum.

Asked by: lexmarkpol
Yes, you can connect the outputs from the GTR-104 directly to the BASSPRO SL. Then use the crossover in the BASSPRO SL to filter out the higher frequencies.
Answered by: Miko at Customer Service
Date published: 2017-12-02

Can this be mounted vertical against a wall or only flat on the floor?

Asked by: Northmnsledder
The BASSPRO SL can be installed vertically, but we recommend otherwise. You can get the best experience from the BASSPRO SL when installed vertically, with around 3-4 inches distance from a panel. This is why, ideally, under a seat would work best. Doing this can give you better low frequency response.
Answered by: Ren at Customer Service
Date published: 2017-12-02

What is the best JBL speaker and amplifier for BassPro SL?

Asked by: Efriza
We would like to work with you directly to help you with your issue. I noticed that you are in Malaysia, please submit a case at support.apac@harman.com and our Customer Service team will be glad to further assist you.
Answered by: Mario at Customer service
Date published: 2017-12-02

Will the BassPro SL work in a 2016 RAV 4 Hybrid Limited

Asked by: Herctam
Thank you for your question, this would work with any vehicle, depending on the connection on your car. The standard wiring is red-12v power, black- negative ground, blue for remote. and audio inputs from your head unit.
Answered by: Randy at JBL
Date published: 2017-12-02

Can I use this on a 2006 Toyota RAV4.

Asked by: Yanira
Yes, as per the "find what fits your car" feature on the website, the BASSPRO SL will fit your 2006 Toyota RAV4.
Answered by: Amir at Customer Service
Date published: 2017-12-02

Can it change my original under seat subs for my e92 bmw 335 2007 ?

Asked by: Mart
Sorry, we have no information about built-in systems in cars, and can only suggest our one possible alternative, the Basspro SL, which you can check out on the JBL web page, to find out if it fits under there.
Answered by: Bo Harman
Date published: 2017-12-02
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