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JBL BassPro 12

Ported powered subwoofer with 12" sub and 150-watt amp

Item # 109GTBASSP

JBL's BassPro12 powered subwoofer adds a blast of bass to your vehicle so you can really feel your music's impact...

JBL's BassPro12 powered subwoofer adds a blast of bass to your vehicle so you can really feel your music's impact...

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About the JBL BassPro 12

Add a blast of bass

JBL's BassPro12 powered subwoofer adds a blast of bass to your vehicle so you can really feel your music's impact as you drive. JBL designed this bass system to shine in the car environment, tuning it for tight, responsive low notes.

Add a blast of bass

JBL's BassPro12 powered subwoofer adds a blast of bass to your vehicle so you can really feel your music's impact as you drive. JBL designed this bass system to shine in the car environment, tuning it for tight, responsive low notes.

Powerful bass from a 12" sub

The BassPro12 enclosure features a JBL 12" sub that really brings the thunder with its polypropylene cone and hi-roll rubber surround. The built-in 150-watt amplifier is matched up perfectly to the sub, so it won't wimp out when it's time to rock. Use an amp wiring kit to power up the BassPro12, and you've turned your car into a concert hall.

Unique port for compact design

The enclosure features JBL's unique Slipstream port, which offers shorter length with a wide-mouth opening that reduces port noise and distortion. This means that JBL can build a more compact enclosure, and still get great performance from this hard-hitting sub. The medium-density fiberboard construction offers strength and durability under extreme conditions, while the carpet covering protects your investment.


Product highlights:

  • powered subwoofer enclosure
  • 12" sub with polypropylene cone
  • built-in 150 watt RMS amplifier (450 watts peak)
  • remote bass-level control included
  • speaker- and line-level inputs
  • 8-gauge amp wiring kit required (sold separately)
  • variable low-pass crossover (40-200 Hz, 12 dB/octave)
  • variable bass boost (0-12 dB at 45 Hz)
  • phase switch (0°, 180°)
  • frequency response: 35-120 Hz
  • fuse rating: 25A
  • dimensions: 22-3/8"W x 14-5/8"H x 11-7/8"D1 x 9-1/8"D2
  • warranty: 1 year
  • Our 60-day money-back guarantee

What's in the box:

  • Powered 12" subwoofer enclosure
  • Two 25A fuses (one installed in amp)
  • Remote level control
  • 16.5' Remote level control cable (RJ-14 connectors on both ends)
  • Two 8" speaker-level input harnesses
  • 1" Patch of hook-and-loop fastener w/ 3M adhesive backing
  • Owner's manual

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Crutchfield response

<< >>

More details on the JBL BassPro 12

Pat M.

Features & specs

Enclosure Type Ported
Finish Material Carpet
Grille None
Connector Type RCA, speaker-level
Bi-amp Inputs No
Woofer Size (inches) 12
Woofer Material Poly
Passive Radiator None
Width 22-3/8"
Height 14-5/8"
Depth 11-7/8"
Parts Warranty 1 Year
Labor Warranty 1 Year
Frequency Response 35-120
Amplifier Power (RMS) 150 watts
Maximum Wattage 450 watts
Sensitivity ---
Impedance ---
Second Voice Coil Impedance ---
Crossover Point 70-120Hz
The JBL BassPro 12 replaces these items:

Product Research


Amplifier: The power output from the built-in amplifier is 150 watts RMS (450 watts max). The amplifier is counter sunk into the back panel of the enclosure (the heat sink fins protrude approximately 3/8").

Signal Input: The amplifier has both speaker level (harness) and line level (RCA) inputs. The input sensitivity range is 50mV-4V for the line inputs and 400mV-16V for the speaker inputs.

Crossover: The amplifier's low pass crossover point is continuously variable from 40 to 200 Hz; the crossover slope is 12 dB/octave.

Bass Boost: The bass boost circuit provides a variable (0-12 dB) signal boost centered at 45 Hz.

Status LEDs: There are two status indicator LEDs on the amplifier. A green LED lights to indicate the amplifier is turned on and operating normally. A red LED lights to indicate the amplifier's protection circuitry has been activated. The protection circuit activates and the amplifier shuts down when the input voltage (power) is too high or too low, when the amp overheats, and when there is a short between the amp and subwoofer.

Enclosure Dimensions:

  • Width: 22.375"
  • Height: 14.625"
  • Depth (bottom): 11.875"
  • Depth (top): 9.125"

Remote Level Control: The included remote level control lets you adjust the output level of the amplifier from the front of the vehicle. It can be mounted under the dash, in the glove compartment, etc, using the supplied 3M hook-and-loop fastener, and connected with the included 16.5' connection cable terminated in RJ-14 connectors. The remote level control has the following dimensions:

  • Width: 1.125"
  • Height: 0.875"
  • Depth: 2.125" (including the knob and cable)


  • Auto Turn-On: Two position switch; on/off; when using the speaker level inputs the amplifier will turn on automatically when it senses an input signal.
  • Phase: Two position switch; 0° or 180°; the sub's phase can be easily inverted.
  • Crossover Frequency: Rotary knob; set the low pass crossover point; continuously variable from 40 Hz to 200 Hz.
  • Bass Boost: Rotary knob; continuously variable from 0 to +12 dB.
  • Gain: Rotary knob; continuously variable from 50mV-4V (line level) or 400mV-16V (speaker level).


  • Remote Bass: RJ-14 jack for use with the included remote bass level control
  • Fuse: A single 25 amp ATO style fuse protects the amplifier (spare fuse included)
  • Line Input: Stereo RCA jacks (female)
  • Speaker Input: 4-pin plug for use with the included high-level input harness.
  • Power Input: Screw terminals for power, ground, and remote turn-on; each will accept spade terminals up to 0.33" wide (approximately).

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Customer Q&A

16 questions already asked

will this work with Kicker 46CK8 wiring kit?
[ Kyle  May 13, 2022 ]
1 answer
Any 8 gauge wiring would work. I'd advise crimping the wire into any supplied terminal fork connectors though. The board where connections are made on the bass pro 12 are awful for fitting bare wire.
[ EVAN  May 13, 2022 ]
Is it ok to use a 4 gauge wire kit instead of 8 gauge?
[ Evan  Mar 26, 2022 ]
1 answer
Yup! Should be totally fine. Be sure to install an appropriate in-line fuse.
[ ZANE  Mar 26, 2022 ]
Why would the sub turn off and on randomly?
[ Sabastian  Mar 24, 2022 ]
1 answer
My first thing to check regarding this would be the protection light. Is that bulb lighting up? Or is the amp itself just turning off occasionally. I'd double check all of your main connections. But the best thing to do might be to trouble shoot this issue with crutchfield support too.
[ EVAN  Mar 24, 2022 ]
This has speaker inputs. I only have a factory sub in the rear deck. Can I power it from those 2 wires or does it require 2 sets of wires that I'd need to run from my rear doors?
[ Matthew  Jan 21, 2022 ]
2 answers
I think you can do it with 2 wires cause I think those connections are just to tell the sub when to turn on and off.
[ SHAWN TERRELL  Jan 23, 2022 ]
If the signal going to your existing sub is low pass (highs cut out), you might be able to convert that signal to an RCA and power up your new JBL. If the existing speaker wires are full range, use the hi-pass connector that came with the JBL. Hope this helps.
[ JOEY  Jan 21, 2022 ]
So can the prebuilt-in amp power other speakers in the car?
[ Colin  Jan 13, 2022 ]
3 answers
No, it has no outputs, just inputs
[ RONALD  Jan 18, 2022 ]
No, it only powers its own speaker
[ CHRISTOPHER  Jan 18, 2022 ]
Could it? Maybe. Should it? Probably not. It's very possible that the amp is built and filtered specifically for low range frequencies and not optimal for full- range speakers. Besides, the amp is matched to the need of the sub driver, so pulling power out to drive other speakers could lead to clipping. You'd be much happier with a separate amp for the rest of your system and just use this unit as it is intended.
[ JAMES  Jan 16, 2022 ]
How long do I need to wait before turning it all the way up?
[ Stone  Dec 02, 2021 ]
2 answers
You may not WANT to turn it up all the way when you first get it; it's pretty powerful. However, the standard break-in period is something like 20 hours of use, with full break-in after 100 hours. I've had mine for about half a year now with hundreds of hours of playtime, and I haven't broken anything turning it up loud.
[ ZANE  Dec 02, 2021 ]
I'm sure Crutchfield will answer this but I have always been told to play moderately for a couple weeks and then after that have at it...
[ WESLEY  Dec 02, 2021 ]
do I need a wiring kit for this or does it come with one?
[ Ty  Nov 26, 2021 ]
1 answer
You need to purchase a separate wiring kit. I got mine at Wally W.
[ EMERAN  Nov 27, 2021 ]
I'm having a problem with my JBL base pro going into protect mold every time the volume is turned up the power is still on but there is no sound when I turn the car off then back on it does the same thing?
[ Rory  Oct 18, 2021 ]
1 answer
I would check all your wire connections to make sure there isn't a electrical problem, but most definitely would just call Crutchfield tech support they can walk you through and hopefully figure out the issue.
[ EVAN  Oct 18, 2021 ]
Will this JBL 12" Slipstream Powered Sub and box fit in the hatch back trunk area in my 1986 Chevrolet Camaro IROC-Z? (3rd gen)
[ Webnizzle  Aug 21, 2021 ]
1 answer
We do not have the measurements of the available space in 1986 Camaro's to check if it can fit. The dimensions of this unit are 22-3/8" wide x 14-5/8" tall x 11-7/8" deep at the bottom and narrowing to 9-1/8" deep at the top
[ Paul  Aug 24, 2021 ]  Staff
Maximum wattage amp they can be used with this particular sub?
[ Melba  May 16, 2021 ]
2 answers
It's a powered sub, amp is built in.
[ Kristine  May 17, 2021 ]
has built in amp with 150 watts RMS
[ CHARLES  May 17, 2021 ]
I've never installed a subwoofer in my car before. I see that I need to purchase an additional 8 gauge wiring kit. Is there anything else that you'd recommend I purchase along with this whether it be for ease of installation of better sound quality?
[ Eric  Mar 11, 2021 ]
3 answers
What kind of vehicle is this going in. I installed mine in a 2019 keep wrangler and the kit was all I needed
[ BRYAN  Mar 12, 2021 ]
Make sure the 8 au comes with a waterproof fuse holder, which needs to be within 18" of your car battery. You will need to run the supplied wire for the remote gain control for the sub. I would run a set of RCA cables and a remote turn on lead close to your head unit just in case, especially if you already have an aftermarket head unit, or plan on adding later.
[ CHRIS  Mar 11, 2021 ]
The wiring kit I bought didn't include the RCA cables, so I would check if the one you bought includes them. You want to figure out where you will get your RCA and remote turn-on signals from. Reach your specific car and see your options. You may have to pull out your head unit and plug in there, or use line out signal converter from your mids in your rear deck. For my car, there was a company which made a wiring harness which hooked up to the factory amplifier in the trunk pre-wired giving me my RCA and remote turn on wires which made things very easy, clean and quick, it took 20 minutes total to install this box. With this harness I just needed a 3' rca cables set if you go into your head unit you may want a 25', or maybe 10' if you tap into speaker wires with signal converter. Do some quick research on your specific car model and year, then get some rca cables.
[ JORDAN  Mar 11, 2021 ]
How do I hook this amp and speaker combo up in my 2019 Jeep JL that has no rca hook ups?
[ Bryan  Apr 13, 2020 ]
2 answers
Crutchfield can sell you an adapter that takes input from your existing factory speakers and convert that to the RCA you need I think it's called a line-level adapter.
[ JAMES  Jan 16, 2022 ]
If you purchased the product from Crutchfield, feel free to contact our Tech Support team. They can walk you through the settings on the product and see if there may be a fix. Our toll-free Tech Support number is printed on your invoice, and is also available under the "My Orders" tab in the "My Account" section of our website. If you did not purchase the unit from Crutchfield, then you may want to contact the manufacturer.
[ Krissy  Apr 23, 2020 ]  Staff

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