12" (300mm) Slipstream ported enclosure

$199.95199.95 each

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Our patented port brings the bass, not the noise.

Series II enclosures deliver the enhanced efficiency and higher output of a vented enclosure, without the distracting noise or “chuffing” generated by a port. The patented Slipstream port dramatically reduces port noise at high sound pressure levels by minimizing airflow turbulence. With high-roll surrounds, proprietary cone design and long-excursion, Series II enclosures deliver deep, powerful bass, with greater accuracy than conventional ported boxes. And the exclusive SSI™ (Smart Selectable Impedance) switch lets you choose 2- or 4-ohm impedance for maximum configuration flexibility. It’s everything you want in a compact, easily installed enclosure.

Item# S2-1224SS

General Specifications

Description 12" (300mm) Slipstream ported enclosure
Impedance 2 or 4 ohms, switch-selectable

Audio Specifications

Power Handling (RMS) 275 W
Power Handling (Peak) 1100 W
Frequency Response 25Hz – 175Hz
Sensitivity 93 dB
Click here for a complete list of all specs for this product

Spec Sheet

English 819 KB
  • 1 ported enclosure
  • 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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S2-1224SS is rated 4.4 out of 5 by 5.
Rated 5 out of 5 by from Good sound from premade enclosure I bought this to add on to factory stereo paired with a jbl 600/1 old school amplifier that is built like a tank. Perfect combination. Has a really good kick. Box is light so I not sure about how durable it is but for now it works great. JBL makes great stuff for a reasonable price.
Date published: 2017-11-20
Rated 5 out of 5 by from Hits Hard!!! This subwoofer hits hard!!! That's all i got to say... Yeah Boi.
Date published: 2017-02-02
Rated 5 out of 5 by from Hits hard and smooth! Like the title states, it hits hard, and it hits smooth. Moves my entire car in all the right ways. Definitely a smart purchase, and a great deal for a beautiful box and sub. This sub blows my old one out the door, and I couldn't be happier that i picked one up.
Date published: 2016-03-14
Rated 4 out of 5 by from Good Value I like the sub because it reaches deep lows without the voice coil bottoming out. It is also good value for money, with a high power rating. It is a bit large however, and takes up rather a lot of boot space. My minor niggles are a) no metal, open grille, cone protection: b) no handles, c) no pro cable socket, and d) slighly low sensitivity. It is great though! I nearly bought a Focal flax 10" driver for about £149 and a box for £40 but these JBL speakers are properly engineered and conveniently ready for use! The Series 3 digitally powered monitor loudspeakers; with sharp crossover slopes, are also a great buy at about £228 Sterling a pair.
Date published: 2017-11-27
Rated 3 out of 5 by from useful sub Not a spl sub, but souds pretty good. I have owned this for a while and it gives 800w with mds xtr t1 amplifier (2ohm with own wires) its not the best or the worst but between that✌
Date published: 2017-02-04
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Hi, I just ordered the S21224SS at best buy store and will ship in the next few days, just wanna know which one jbl amplifier is the bestand compatible for that subwoofer? Thank you

Asked by: Allhan
From what I’ve seen in this thread and what I’ve researched the GX-A3001 is a good amp for this. Idk if that’s JBL but I’ve heard good things about it.
Answered by: JMP23
Date published: 2018-01-28

What is the length/width of this sub box from the front from side to side? 

Asked by: Avenger FC
Hello, This is the Dimensions: Length: 22-1/2" (570mm) Width: 12-7/16" (315mm) Height: 15-3/16" (385mm) Thank you for your inquiry.
Answered by: Zoltan
Date published: 2018-02-19

What is the best amp from JBL to pair up with this sub? 

Asked by: Cameronc
The S2-1224SS can handle 275 watts of RMS power handling. This means that any sub amp with an impedance of 2 or 4 ohms and a power output of 275 watts will work fine with these speakers.
Answered by: Joe G at Customer Service
Date published: 2017-12-02

Is there a different RMS at 2ohm and 4ohm settings?

Asked by: nbeda
The S2-1224SS can handle 275 watts of RMS power handling. This means that any amp with an impedance of 2 or 4 ohms and a power output of 275 watts per channel will work fine with these speakers. That said, the power that the speaker can handle remains the same whether it's switched to 2 or 4 ohms.
Answered by: Joe G at Customer Service
Date published: 2017-12-02

I have two sets GTO609C and a single S2-1224SS (over kill for a 1968 Volvo 122 Amazon). I was considering a GX-A604 to drive the two sets GTO609C and a GX-A3001 to drive the S2-1224SS. Am I in the right direction or is there a better solution?

Asked by: Kevin Campher
Yes you definitely are in the right direction. The amps would work perfectly with your speakers .
Answered by: Mario at Customer service
Date published: 2018-01-28

Does this ported box include the subwoofer as well?

Asked by: loganmetz
Yes it does. The ported box includes the Subwoofer.
Answered by: Mario at Customer service
Date published: 2017-11-30

What is the best amplifier for this subwoofer

Asked by: BigFella74
The best amplifier for the S2-1224ss would be the GX-A3001 since it can handle 275W at 4 ohms while the amp drives 200W at 4 ohms, but since that specific amp is not available. The next in line would be the JBL Club 5501 which drives 370W at 4 ohms, It may be too much for the sub can handle but it can still play it as long as you don't push the volume up too much, It should still be fine.
Answered by: Mario at Customer service
Date published: 2017-12-13

Do you have to buy an amplifier for it or is it built in

Asked by: T_z1
Hi, Thank you for your question. Yes, this is a passive subwoofer that requires an amplifier to work. You can also see the installation process in our owner's manual. If you need more information, please contact our helpdesk.
Answered by: Danny HARMAN
Date published: 2017-12-02
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Sonic Electronix
JBL S2-1224SS
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