12" (300mm) high-performance car audio subwoofer

£126.99126.99 each £169.99
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A subwoofer that puts you in the driver’s seat

JBL believes sound quality should never be compromised. And Series III subwoofers make sure you don’t have to compromise flexibility, either. That’s because the high-performance, step-up subwoofers feature SSI™ (Selectable Smart Impedance), an exclusive impedance switch that lets you select the optimum impedance—2 or 4 ohms—for your system. Special aero-cooling design in the voice coil boosts power handling as well as reliability. And an oversized voice coil handles more power than common two-inch voice coils. More power, more reliability, more flexibility—and no compromising. When you’re ready to step up, Series III is your subwoofer.

Item# S3-1224

General Specifications

Frequency Response 25 Hz - 175 Hz

Audio Specifications

Power Handling (Peak) 1500 W
Sensitivity 92 dB
Power Handling (RMS) 500 W
Frequency Response 25 Hz - 175 Hz

Woofer Specifications

Voice Coil 63 mm
Click here for a complete list of all specs for this product

Spec Sheet

1 MB
  • 1 subwoofer
  • Owner’s manual

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

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S3-1224 is rated 5.0 out of 5 by 3.
Rated 5 out of 5 by from Hits Hard!!! It hits nice and smooth. I put it in a nice enclosure vented box.
Date published: 2017-03-07
Rated 5 out of 5 by from I love it I got these from a local stereo shop. And they are a beast. I haven't even broken them in yet and they have a smoothe strong beat at 2om
Date published: 2017-03-04
Rated 5 out of 5 by from Great quality I just got this today and it's a beast. I can feel it in my chest
Date published: 2015-07-18
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Is the JBL GTO 501EZ adequate running this sub?

Asked by: Martin82
Hi Martin, The GTO 501EZ may be a little underpowered for the peak power of the subwoofer. It will easily drive the subwoofer though, but if you wanted to get a bit more power, you can also upgrade your amplifier somewhere in the future. If you require more information, please contact us on customer.support@harman.com
Answered by: Kay Harman
Date published: 2017-04-02

Do you have to put this in an enclosure or can it go in the back parcel shelf 

Asked by: Jb97
Hi. For best results with subwoofers, always build a box according to specs from JBL. But you can use it in a parcel shelf, and bass will be the result. However, the actual result depends on the area and seal of the shelf, its sturdiness and the volume of the trunk, which will act as enclosure. Also, you will not be able to play as loud as you could with an enclosure, because there is no air spring or tuned port that can reduce cone excursion. You will in effect have an undamped, free-air enclosure.
Answered by: Bo Harman
Date published: 2017-03-20

Hi, Can you recommend an amp suitable to power two of these together with maximum performance? Thanks.

Asked by: Boseley
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