About the JBL Stadium 1224
Quality and power
Quality and power
JBL has been building high-performance loudspeakers for decades, so they know something about bass. They made their latest Stadium Series subwoofers to deliver powerful low-end punch and handle the high wattage of today's car amplifiers.
Handles up to 500 watts RMS
The Stadium Series 1224 12" sub handles up to 500 watts RMS, and it's optimized for use in a very small sealed enclosure. JBL uses the airflow from the internal works to cool the 2-1/2" voice coil, so you can rely on this sub to stay cool in the heat of battle. The sturdy polypropylene cone and nitrile rubber surround will stand up all the abuses of heavy bass output.
Selectable impedance
This Stadium Series subwoofer features SSI™ (Selectable Smart Impedance), a switch which lets you vary the sub's impedance from 2 ohms to 4 ohms to optimize its effectiveness. If you upgrade your amplifier or decide to add another sub, you'll be able to adjust the 1224's impedance to work best with your system.
Versatile power
The terminals on this Stadium Series sub will accept up to 10-gauge wire. You'll get full power from your amp even over long wire runs, so you and your subwoofer have the juice you need. See what this JBL sub can do for your system.
Product highlights:
- 12" high performance car audio subwoofer
- polypropylene cone
- nitrile rubber surround
- stamped steel vented basket
- handles up to 500 watts RMS (1500 watts peak)
- frequency response: 25-175 Hz
- sensitivity at 2.83V: 92dB
- voice coil diameter: 2-1/2"
- impedance: 2 or 4 ohms switchable
- mounting depth: 7"
- mounting height: 3/4"
- sealed box volume: 0.75 cubic feet
- ported box volume: 2.5 cubic feet
- grille not included
- warranty: 1 year
- Our 60-day money-back guarantee
- MFR # STADIUM 1224
What's in the box:
JBL Stadium 1224 owner's manual
- One 12" Subwoofer (with impedance switch)
- Eight 1" Screws (4mm Allen head)
- 8 Washer/Spacers
- Owner's manual (English/ French/ Spanish/ Portuguese/ Italian/ German/ Russian/ Swedish/ Finnish/ Polish/ Dutch/ Indonesian/ Japanese/ Korean/ Chinese/ Danish/ Turkish)
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More details on the JBL Stadium 1224
Features & specs
| Size | 12 -inch | |
| Impedance (Ohms) | 2, 4 | |
| Cone Material | Polypropylene | |
| Surround Material | Rubber | |
| Ideal Sealed Box Volume (cubic feet) | 0.75 | |
| Ideal Ported Box Volume (cubic feet) | 2.5 | |
| Port diameter (inches) | 4 | |
| Port length (inches) | 11.7 | |
| Free-Air | Yes | |
| Dual Voice Coil | No | |
| Sensitivity |
92 dB at 2.83 volts | |
| Frequency Response | 25 - 175 Hz | |
| Max RMS Power Handling | 500 | |
| Peak Power Handling (Watts) | 1500 | |
| Top Mount Depth (inches) | 7 1/16 | |
| Bottom Mount Depth (inches) | N/A | |
| Cutout Diameter or Length (inches) | 11 1/16 | |
| Vas (liters) | 54.65 | |
| Fs (Hz) | 28.84 | |
| Qts | 0.47 | |
| Xmax (millimeters) | 12 | |
| Parts Warranty | 1 Year | |
| Labor Warranty | 1 Year | |
Product Research
Features
Selectable Smart Impedance (SSI): A switch on the input terminal allows you to easily change the woofer's impedance between 2Ω and 4Ω settings. (The connected amplifier should be off when changing the impedance.) The power handling is the same for either setting; 500 watts RMS/1500 watts peak.
Terminal: The set screw wire terminals will accept bare wire up to 10 gauge and are tightened/loosened with a 2.5mm Allen wrench (not included).
Enclosure Recommendations:
- Sealed Box Volume: 0.75 ft³
- Ported Box Volume: 2.5 ft³ with one 4" diameter x 11.7" long port (tuned to 30 Hz)
- Free-Air: The woofer can also be mounted in free air to a baffle board (infinite baffle, no enclosure). When mounted in free air, the power handling is reduced by half (to 250 watts RMS).
- Band-Pass: JBL also recommends a prefabricated band-pass enclosure, but no volume specifications are listed in the manual. Band-pass enclosures often provide the most output available from any amplifier and subwoofer combination, but at the expense of sonic accuracy.
Thiele-Small Parameters: Some of the parameters change based on the impedance setting:
| 2Ω | 4Ω | |
| Re (Ω) | 1.82 | 4.07 |
| Le (mH) | 1.03 | 0.94 |
| Sd (cm²) | 530.93 | 530.93 |
| Bl (Tm) | 11.70 | 16.99 |
| Vas (liters) | 54.65 | 52.59 |
| Cms (μm/N) | 138 | 133 |
| Mms (g) | 220.58 | 225.64 |
| Fs (Hz) | 28.84 | 29.07 |
| Qms | 4.29 | 2.56 |
| Qes | 0.53 | 0.58 |
| Qts | 0.47 | 0.47 |
| Xmax (mm) | 12 | 12 |
The JBL Stadium 1224 replaces these items
- polypropylene cone
- handles up to 500 watts RMS (1500 watts peak)
- impedance: 2 or 4 ohms switchable
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Customer Q&A
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Just installed this awesome 12" sub in the trunk of my 2013 Dodge Avenger... The bass is loud, clear and DEEP!!! VERY happy with this purchase! JBL are my speakers of choice.
Daniel from West Des Moines, IA