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Ground Shaker GSP 1 12

12" Single Ported/Vented Enclosure


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This item has been discontinued

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General Features:

  • 12" Single PRO Ported Subwoofer Enclosure
  • Subwoofer mounting depth: 9-1/2"
  • Durable 11/16" Medium Density Fiberboard (MDF) construction
  • Total box volume: 1.48 cubic feet
  • Dimensions: 17-1/2"D x 17-1/2"W x 13-1/2"H
  • CARB compliant design
  • Made in USA
  • Authorized Internet Dealer

Speaker Box / Enclosure Specifications

Subwoofer Size
Refers to the diameter of the subwoofer, measured in inches.
Subwoofer Cutout Shape
This is the shape of the enclosures cutout hole and defines the style of subwoofer that can be installed.
Round / Circle
Box Type
Represents the style of the enclosure. Be sure to purchase the appropriate enclosure type and internal volume that will be compatible with your subwoofer's recommendation.

Sealed - Sealed boxes are those that have no holes or vents in it. The only hole in a sealed box is where the subwoofer is installed. Smaller sealed boxes require more power than a larger sealed box. They provide a tight, accurate bass, while the larger sealed enclosures provide a "boomier" and louder bass.

Ported / Vented - Ported/Vented Enclosures provide an even boomier, louder bass, but less accurate then a small, sealed box. Ported enclosures typically require more airspace per sub and also less power output from an amplifier to perform correctly.

Bandpass - Bandpass enclosures make subwoofers perform efficiently, but loose. The bass is not as "boomy" as a ported enclosure nor as punchy as a sealed enclosure. Bandpass enclosures work well with lower to mid-level subwoofers.
Vented / Ported
Number of Subs/Speakers
This value represents the number of speakers or subwoofers that the enclosure accommodates.
Box Style/Shape
The box style or shape refers to the actual shape of the box. Square and rectangular boxes are straight-edged boxes on all sides, whereas hatchback and truck style enclosures feature an angled front or back design that allows for installation in places short on depth such as single cab pickup trucks. You can also use such enclosures in hatchback cars or other vehicles where space is a premium. Tube and cylinder shaped boxes were made popular by Bazooka and are a great option for those looking for a nice amount of bass without sacrificing lots of space. They may even fit in locations that slim truck boxes cannot fit in. If the enclosure is vehicle specific, we encourage you to read the product description to find out which vehicles the enclosure is made for.
Total Box Volume
The internal volume measurement in cubic feet before subwoofer magnet displacement.
1.48 cubic feet
The height of the item, measured from top to bottom, in inches.
The width of the item from left to right (side-to-side) measured in inches.
The front-to-rear depth of the item, in inches. If the item is angled or slanted, this value is the bottom measurement.
Tuning Frequency
Compatible Vehicle Make and Model
The model of vehicle that this vehicle specific product is designed for. Please keep in mind that engine variations can affect the compatibility of the products.

Port Details

Number of Ports
The number of ports the enclosure has.
Tuning Frequency


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Warranty and Return Policy

Parts Warranty Duration
Not warranted
Labor Warranty Duration
Not warranted
Warranty Provider

Summary of Customer Ratings & Reviews

Rating Distribution

5 Star
4 Star
3 Star
2 Star
1 Star

Average Attribution Rating

kevin c.


Great tuned quality box!

April 7, 2014

I have purchased the 10" and 12" version of this box, the mdf is quality and the carpet work is really nice!
The box is tuned perfectly and hits a full range of hz, I have yet to find a better round port box for the price.

Great price, amazing quality, and fast shipping!

7 of 13 found this helpful

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Longmont, CO

Not quite...

January 13, 2014

The box is definitely sturdy and well constructed. I think that I was hoping for a better product to throw my sub into that would've been less hassle for me, which is the reason I purchased it so I wouldn't be building my own. The port tube was a little loose, so I had to glue it. It was missing a screw on the outside port mounting point, maybe all the black from the carpet and the black screws going into the black plastic confused the assembly person. The terminal cup connectors inside are ridiculously thin and my 1/4" female quick disconnects had to be massively crimped down and still seemed like they wanted to slide off. I actually think I may have to replace the quick disconnects with ring terminals, which fortunately are an option thanks to the nuts that hold the ultra thin gold plated strips to the cup terminal. My final gripe is that the speaker hole was cut oblong, which created a nightmare for setting the speaker for mounting. In hindsight I could've used some bobby pins to repeatedly lift and reset until I found the perfect position before drilling my holes. Additional note, if you are trying to put an Alpine 12" into this box, it for the most part doesn't fit well without some severe maneuvering.

6 of 13 found this helpful

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Spring Hill, FL

Great box!

January 13, 2014

Works great with the 12" single VC unit I also purchased here in my vehicle. These boxes are built very well with attention to detail and workmanship. The proof is in the end result. Very easy to install woofer and wires as well as fitting into vehicle. My next box will definitely be a ground shaker unit as well from Sonic.

5 of 11 found this helpful

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Portage, IN

Just OK

April 25, 2014

Box looks good, with the exception it doesn't actually come with that Ground Shaker plate on it. Sound quality is on point. Bad points would be the port tube fell off before package even made it threw the delivery, and the sub hole is cut poorly making getting all screws for sub mount difficult, I managed 7 out of the 8 in a rush.

4 of 10 found this helpful

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Product Summary


Model Number

GSP 1 12



Internal SKU


Internal Product ID


Sonic Electronix Wiring Guide

Wiring Diagram Legend

Warning: The image depicted shows the resistance change when wiring multiple subwoofer terminals. Please refer to your subwoofer's owner's manual for the proper wiring of its terminals. Sonic Electronix, Inc. is not responsible for damage caused to your audio system or vehicle due to improper installation. Please call tech support at 1-877-289-7664 if you require additional assistance.

Product Name: Ground Shaker GSP 1 12