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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

JBL
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• Peak Power: 1350W
• RMS Power: 450W
• Glass fiber & paper pulp composite cone
• Nitrile rubber surround
• Includes Sealed Enclosure

Learn more about the jblsubsd122ssiam_xmdfs121

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Description


JBL brand icon

Authorized dealer

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.

JBL Stadium 122SSI (JBLSUBSD122SSIAM)

1500W Peak (500W RMS) 12" Stadium Series Single 2-or 4-ohm Car Subwoofer
Quantity: 1

Product Details:

  • 12" Single 2 or 4 ohm Stadium Series Subwoofer
  • Power Handling:
    • Peak: 1500 watts
    • RMS: 500 watts
  • Glass Fiber and Pulp/Kevlar Cone
  • Nitrile Butadiene Rubber NBR Surround
  • Stamped steel vented basket
  • SSI (Selectable Smart Impedance)
  • Special aero-cooling design
  • Premium integrated push terminals
  • 2" High Temperature Aluminum Voice coil
  • 10.25 mm Xmax
  • Single Stacked Ferrite magnet motor structure
  • Frequency Response: 25 - 175 Hz
  • Resonance Frequency (Fs): 33.8 Hz
  • Sensitivity: 92 dB
  • Recommended sealed box volume: 1.3 cubic feet
  • Recommended ported box volume: 2.5 cubic feet
  • Top-mount depth: 7"
  • Cutout diameter: 11-1/5"
  • Authorized Internet Dealer
  • 3 Year Manufacturer's Warranty

  • Priced Individually

NVX XMDFS121

Single 12” Sealed 3/4" (1.3 cubic ft) MDF Black Carpeted Subwoofer Enclosure (Made in the USA)
Quantity: 1

Product Details:

  • Single 12" Sealed MDF Enclosure
  • Holds one 12" subwoofer
  • 3/4 MDF (Medium Density Fiberboard) Construction
  • Made in the USA
  • Each Piece is CNC Cut Exact to Specification
  • Sealed Box Design
  • Durable black carpeting
  • Gold Terminals
  • Internal Box Volume: 1.3 cubic ft.
  • Dimensions: 14.5"H x 16"D x 13"W
  • Authorized Internet Dealer
  • 1-year Manufacturer's Warranty

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Specifications & Details


Subwoofer Specifications
Series
JBL Stadium Series
Subwoofer Size
12"
RMS Power Handling
500 watts
Peak Power Handling
1500 watts
Woofer Composition
Glass Fiber and Pulp/Kevlar
Woofer Surround
Nitrile Butadiene Rubber NBR
Sensitivity
92 dB
Frequency Response
25 - 175 Hz
Subwoofer Design
Round / Circle
Enclosure Specifications
Box Type
Sealed
Number of Subwoofers
1
Box Style/Shape
Square/Rectangle
Wood Thickness
3/4"
Number of Terminals
1
Terminal Type
Binding posts
Box Exterior Color
Black
Box Finish
Carpet
Warranty and Return Policy
Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider
Manufacturer

Item Details


Manufacturer:

JBL

Model Number:

Stadium 122SSI, XMDFS121

Weight:

39.89lbs

Internal SKU:

jblsubsd122ssiam_xmdfs121

Internal Product ID:

195523

Customer Ratings & Reviews


JBL Stadium 122SSI with Sealed Enclosure thumbnail image

5 star
75%
4 star
25%
3 star
0%
2 star
0%
1 star
0%



Durability
4.8
Value
4.9
Features
4.8
Design
5
Usability
5

Customer Photos & Videos


Customer Reviews

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Perfect fit

The following review is for XMDFS121, which is a part of the bundle you are viewing.

I thought this box would be kinda bad when i purchased but its holding about 700+ watts at bay with the Nvx vsw dual 4 ohm sub. When i inspected the box before sub install I had more confidence with it. I did upgrade the terminal cup since i was running over 700+ watts to a 600 watt sub. Its holding up good so far and matches very well with the nvx vsw.

By Dizzy on December 24, 2023 Checkmark Icon Verified purchase

56 found this helpful


Good box

The following review is for XMDFS121, which is a part of the bundle you are viewing.

Box sounds great, have it paired with a JL 12W0v3-44

By Lucas on January 23, 2022 Checkmark Icon Verified purchase

49 found this helpful


Solid...

The following review is for XMDFS121, which is a part of the bundle you are viewing.

Well built sub box and looks great too. For the price, you cant go wrong.

By Jay on May 2, 2022 Checkmark Icon Verified purchase

44 found this helpful


Decent for the price

The following review is for XMDFS121, which is a part of the bundle you are viewing.

Looks good, works good however the glue on the carpet could be better. It's been in my car for a few weeks now and I checked some things earlier and the carpet is already peeling.

By Ken on September 30, 2022 Checkmark Icon Verified purchase

42 found this helpful


The following review is for XMDFS121, which is a part of the bundle you are viewing.
By dale on September 27, 2023 Checkmark Icon Verified purchase

39 found this helpful


JBL Never Disappoints

The following review is for Stadium 122SSI, which is a part of the bundle you are viewing.

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 Checkmark Icon Verified purchase

39 found this helpful


Awesome

The following review is for Stadium 122SSI, which is a part of the bundle you are viewing.

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 Checkmark Icon Verified purchase

39 found this helpful


The following review is for Stadium 122SSI, which is a part of the bundle you are viewing.
By Stanley on September 9, 2023 Checkmark Icon Verified purchase

27 found this helpful


Great Sub box

The following review is for XMDFS121, which is a part of the bundle you are viewing.

Very sturdy, well put together.

By Steven on March 3, 2024 Checkmark Icon Verified purchase

15 found this helpful


The following review is for Stadium 122SSI, which is a part of the bundle you are viewing.
By Haydon on January 27, 2025 Checkmark Icon Verified purchase

2 found this helpful




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