JBL Stadium 122SSI

1500W Peak (500W RMS) 12" Stadium Series Selectable Smart Impedance 2 or 4 Ohm High-Performance Subwoofers

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• Peak Power: 1500 watts
• RMS Power: 500 watts
• Glass Fiber and Pulp/Kevlar Cone
• Nitrile Butadiene Rubber NBR Surround
• Impedance: Dual 2 or 4 ohms
• Mount depth: 7.117"
• Sensitivity: 92 dB

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JBL Stadium 122SSI with Sealed Enclosure

1500W Peak (500W RMS) 12" Stadium Series Selectable Smart Impedance 2 or 4 Ohm High-Performance Subwoofers





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Switching up the Game

JBL believes sound quality should never be compromised and the Stadium subwoofers make sure you don’t have to compromise flexibility, either. That’s because these high-performance subwoofers feature SSI™ (Selectable Smart Impedance), an exclusive impedance switch that lets you select the optimum impedance—2 or 4 ohms—providing multiple system configurations and flexibility. A special aero-cooling design keeps the voice coil cool even at high output levels. This feature coupled with oversized voice coils increases power handling and ensures long-term reliability. More power, more reliability, more flexibility—and no compromises. When you’re ready to step up, Stadium is your subwoofer.

Go with the Flow

The Stadium’s voice coil significantly increases power handling and improves reliability by going with the flow—of air. The woofer’s motor channels air pumped by the cone movement past the voice coil, and the voice coil former exposes the coil’s inner and outer surfaces to the airflow. This aero-cooling design is unique among aftermarket subwoofers.

Product Details:

  • 12" Dual 2 or 4 ohms JBL Stadium Series Subwoofer
  • Power Handling:
    • Peak: 1500 watts
    • RMS: 500 watts
  • Glass Fiber and Pulp/Kevlar Cone
  • Nitrile Butadiene Rubber NBR Surround
  • Aero-Cooled Voice Coil
  • Premium Integrated Terminals
  • 3" High Temperature Voice coil Material
  • 10.25 mm Xmax
  • magnet motor structure
  • Frequency Response: 25 - 175 Hz
  • Resonance Frequency (Fs): 33.8 Hz
  • Sensitivity: 92 dB
  • Sealed box volume: 1.3 cubic feet
  • Ported box volume: 2.5 cubic feet
  • Top-mount depth: 7.117"
  • Cutout diameter: 11-5/16"
  • Authorized Internet Dealer
  • Protective subwoofer grille: No
  • 1-year Manufacturer's Warranty

  • Priced Individually

Subwoofer Wiring Guide

Wiring Guide to Wire 1 JBL Stadium 122SSI Subwoofer

Mono Amp

Mono Amp - Option 1

2 Channel Amp - Bridged

Wiring Guide to Wire 2 JBL Stadium 122SSI Subwoofers

Mono Amp

2 Channel Amp

4 Channel Amp - Bridged

Wiring Guide to Wire 3 JBL Stadium 122SSI Subwoofers

Mono Amp

Mono Amp - Option 1

4 Channel Amp

Wiring Guide to Wire 4 JBL Stadium 122SSI Subwoofers

2 Channel Amp

4 Channel Amp

Specifications & Details

Subwoofer Specifications
JBL Stadium Series
Subwoofer Size
Peak Power Handling
1500 watts
RMS Power Handling
500 watts
Voice Coil(s)
Impedance (Per Voice Coil)
2 or 4 ohms
Voice Coil Material
Voice Coil Diameter
Frequency Response
25 - 175 Hz
92 dB
Xmax (millimeters)
10.25 mm
Subwoofer Design
Round / Circle
Main Cone Color
Woofer Composition
Glass Fiber and Pulp/Kevlar
Woofer Surround
Nitrile Butadiene Rubber NBR
Subwoofer Grille
Re-Cone Kit Available
CTA-2031 Compliant
Recommended Enclosure Specifications
Recommended Enclosure Type
Ported / Vented
Minimum Sealed Box Volume
1.3 cubic feet
Minimum Ported Box Volume
2.5 cubic feet
Top-Mount Depth (Mounting Depth)
Cutout Diameter
Shallow Mount Installation
Electromechanical Parameters
Free-Air Resonance (Fs)
33.8 Hz
Equivalent Compliance (Vas)
40.48 liters
Total Speaker Q Value (Qts)
Electrical Q Value (Qes)
Mechanical Q Value (Qms)
What is in the box?
User manual
WITB: Subwoofers
Other Accessory #6
Warranty and Return Policy
Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider

Item Details



Model Number:

Stadium 122SSI



Internal SKU:


Internal Product ID:


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I have these in a custom built box tuned down to 30 Hertz. The box just about took up the whole big trunk in the Cadillac. Pushing them with a BAMF 5000D. They sound absolutely amazing.

By Dinky on March 1, 2022 checkmarkIcon Verified purchase


found this helpful.

JBL Never Disappoints

I’ve been a JBL fan for years, I have it all, from wireless headphones to 7.2 home theater systems and soundbars, so it’s no surprise that I went with the Stadium 12s for my build. I put one 12 in a custom box at first, sat in storage for 3 years before I finally took it back out, added a second 12 and hooked my NVX 1700.1 amp. This setup hits hard ???????????? well built subs, powerful, sound quality is top notch as usual, carbon fiber cones and factory surrounds are beautiful. Jbl really went in on this one. I’m curious about the Arena X 12s, maybe next year I’ll upgrade ???? don’t tell my wife.

By Gerald on September 13, 2022 checkmarkIcon Verified purchase


found this helpful.


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