450-watt, 12" powered subwoofer system

$249.95249.95 each
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The easiest way to add high-output, low-distortion bass to any car audio system is with the JBL® GT-BassPro12 – a powered subwoofer that pumps out car-rocking bass through a design so cool you won’t want to hide it in your trunk. Simply put, it’s a complete subwoofer system for your vehicle. Its patented Slipstream port design delivers deep, bottom-end bass while minimizing port noise. Its woofer features improved motor-structure venting for thermal protection and a progressive spider to ensure superior mechanical reliability even at the highest output levels. Its amplifier delivers maximum power and the flexibility to connect to any factory-installed or aftermarket head unit. And with the system’s included remote level control, which lets you adjust the bass level from the driver’s seat, the only time you’ll need to stop is for gas.

What's in the box?

  • (1) GT-BassPro12 Enclosed Subwoofer
  • (1) Owners Manual

The JBL® GT-BassPro12 powered subwoofer features a polypropylene cone and a rubber surround to provide superior reliability and cone resonance damping. All of that technology translates into tight, powerful, natural-sounding bass that may outlast your car.

The JBL® GT-BassPro12 powered subwoofer system’s built-in amplifier is designed to complement its subwoofer for maximum performance. You won’t have to worry about finding the right amp. We’ve included it for you.

Let the other guy have to stop and pop the trunk. The JBL® GT-BassPro12 powered subwoofer’s remote level control lets you adjust the bass from the driver’s seat, so you can enjoy your ride without interruption.

The JBL® GT-BassPro12 powered subwoofer’s progressive spider exerts control over the cone’s motion at high excursion for superior reliability even at the highest listening levels.

The JBL® GT-Basspro12 powered subwoofer’s vented polepiece helps cool the subwoofer’s motor for improved power handling and lower power compression. That technology makes the JBL® GT-BassPro12 one cool subwoofer.

A proprietary Slipstream port is a special feature of the JBL® GT-BassPro12 powered subwoofer. The port’s dual flares form an adverse pressure gradient that eliminates port noise at high output – noise that signals that the port is no longer able to pass enough air to operate effectively. The Slipstream port provides clean, distortion-free performance even at the highest output levels.

The JBL® GT-BassPro12 powered subwoofer uses oversized, stacked magnets to increase magnetic flux for higher output and cone motion control, and room for high voice-coil excursion.

The JBL® GT-BassPro12 powered subwoofer has flexible connections that allow you to connect it to any car audio system.

The JBL® GT-BassPro12 powered subwoofer automatically turns on when it senses a signal on the speaker level input, eliminating the need for a remote turn-on wire when the system uses the speaker level inputs. What’s more, the GT-BassPro12 will automatically turn itself off a few minutes after the signal stops.

Your JBL® GT-BassPro12 powered subwoofer looks every bit as powerful as it sounds. Its speaker-protection bars help keep the woofer cone safe and project a sleek, muscular look.

305mm; (12")
Frequency Response
Power Handling (RMS)
50mV – 4V (line-level input); 0.4V – 16V (speaker-level input)
Power Handling (Peak)
Peak Power
Amplifier Power
150 watts RMS; 450 watts max power
Max Current Draw
Idle Current Draw
less than 500mA
Crossover Frequency
70Hz – 120Hz
Weight (lb)
Depth (in)
Depth (mm)
Weight (kg)
Width (in)
Height (in)
Height (mm)
Crossover Slope

The latest owner's manuals, quick start guides, and documents.

1 Year Warranty

Products purchased online or from an authorized local retailer and under warranty may qualify for an exchange with a valid receipt.

Purchases made from an unauthorized dealer will not be eligible for exchange.

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GT-BASSPRO12 is rated 4.125 out of 5 by 8.
Rated 5 out of 5 by from Wowwed by both the performance and reliability Been using the JBL GT-BassPro for the last 2 years and am very satisfied with its performance and durability. I like my music cranked and this subwoofer gives me what I want with no complaints. From Classical to AC/DC it fills the bill in my 300C.
Date published: 2016-08-09
Rated 5 out of 5 by from great sound i had a local shop install this in my 1996 Tahoe and it sounds great . i am 100% surprised at the amount of bass this puts out for a small package
Date published: 2014-08-05
Rated 5 out of 5 by from Best sounding and least expensive of any I've had My weekend car is actually garaged at the moment so I'm using it in my home entertainment system. Powered by a 500 watt computer power source. It sounds great. The remote is nice. I've spent twice as much and not been as happy.
Date published: 2014-05-22
Rated 5 out of 5 by from Boom, Boom, Pow! Wow... I coupled this GT-BassPro12 with JBL GT638s in my 2011 Jeep JK. WOW!!! you get as much bass as you want. This powered subwoofer is incredibly easy to install and fills the space in my JK with way more bass than I need (seriously... I am 43); but, put Beastie Boys Intergalactic on and I feel 28 all over again! The box will take up most of your space in a Jeep - so, be prepared. Bigger cars will have no problem. The amp comes with all the important bits like bass boost, crossovers, and a remote that is easy to hide in the glove box. I love this subwoofer system.
Date published: 2014-05-11
Rated 5 out of 5 by from Amazing bass in a deceptive package! This combination is perfect for addition to a stock car sound system as it is self contained in a compact smart package. From the auto power on to the built in high level inputs, the convenience is unbeatable. Over and above that, the sound is amazing! The remote level control is a must because this is simply too loud for conventional commute trips, but when you need to crank it up, it certainly turns heads! Be sure to check he youtube videos for the car shaking that this little sub can produce. The power ratings may seem low, but it will blow out conventional 1000W subs from other manufacturers. The built in amp shows no strain whatsoever, barely gets warm even on a spanking hot day, class D technology! No battery drain or dipping headlamps either. For this price, you will never get a sub woofer and amplifier of this quality and this is entry level JBL! Can only imagine what their premium subs can do, but this is MORE than sufficient for the average joe that isn't looking at sound competitions. The box and port are also premium quality, the slip stream port eliminates baffle noise completely and is perfectly tuned for the sub and amplifier. This plays low notes that I didnt know existed with some of my old music! Right down to 30hz is very audible, but the box and port are tuned to 45hz, which it loves. HIGHLY RECOMMENDED!
Date published: 2014-04-17
Rated 5 out of 5 by from AMAZAZING! perfect for a budget with small space and amazing quality sound from just 1 12 inch sub. if your looking to add bass to your ride, get this now. adds that bang that you just need and only thing you need to hook it up is just an 8GA amp kit . :)
Date published: 2013-09-05
Rated 2 out of 5 by from Great Bass, Randomly stopped turning on bought this a few years ago. Never had a problem with it until it came unplugged. Now the amp wont turn on.
Date published: 2014-10-29
Rated 1 out of 5 by from Dead on 1st day. Sounded great when I was driving to work (in the afternoon). Driving home in the morning, it would not power on. Wow, now that's quality. I will be contacting JBL Monday to see how they are going to make this right.
Date published: 2015-03-15
  • 2016-10-22T09:16CST
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