Atrend 12SQL

12" Single Medium Pro Series Sealed Subwoofer Enclosure

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• 12" Single Medium Pro Series Sealed Subwoofer Enclosure
• Premium carpeted Finish
• Silver Spring Loaded Terminal Cups
• Completely Miter and Dado Panels
• Glued and Braced with Fasteners

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Strong, Reliable Enclosures

Engineered and manufactured using only the best additives throughout the production cycle. Hardwood MDF combined with true mitered corners and full inset dados. Atrend line of product is built for the high-end niche market.

From design to delivery, Atrend products are tested vigorously to ensure sound quality and accurate engineering. Working with only the latest in computer automated software and machinery, Atrend continues to be a trend setter in the marketplace. Atrend delivers quality results by utilizing only the most efficient engineering and manufacturing processes.


General Features:

  • 12" Single Medium Pro Series Sealed Subwoofer Enclosure
  • Made in the USA
  • Completely miter and dado end panels
  • Premium carpeted finish
  • Silver spring loaded terminal cups
  • 3/4" MDF construction
  • Glued and braced with fasteners
  • Total box volume: 1.00 cubic feet
  • Dimensions: 13-1/2D x 13-1/2"W x 13-1/2"H
  • Authorized Internet Dealer
  • 1-year Manufacturer's Warranty

Product history:

Atrend 12SQL thumbnail
(newest, current model)
Ground Shaker SQ 1 12-GRAY thumbnail
(previous model, replaced by Atrend 12SQL)
Sonic Sub Boxes 1SL12-1.0-GRAY thumbnail
(previous model, replaced by Ground Shaker SQ 1 12-GRAY)

Specifications & Details

Box/Enclosure specifications
Subwoofer Size
Subwoofer Cutout Shape
Round / Circle
Box Type
Number of Subwoofers
Box Style/Shape
Cutout Diameter or Length
Maximum Speaker Depth
Total Box Volume
1.0 cubic feet
Box Volume (Each Chamber)
1.0 cubic feet
Wood Thickness
Number of Terminals
Terminal Type
Spring posts (banana clip ready)
Box Exterior Color
Box Finish
Port Details
Number of Ports
Warranty and Return Policy
Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider

Item Details


Model Number:




Internal SKU:


Internal Product ID:


Customer Ratings & Reviews

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Customer Reviews

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Nice box

This is a really nice box. I have a Boston Acoustics G5 in it and it pounds!!! I wanted to save space in trunk by switching to small sealed box instead of the big ported I was using previously. I thought I would be taking a hit in SPL but surprisingly I didn't. Just a gain in SQ. And I gained about 50% more trunk space.

By Dangelo on September 21, 2017 Checkmark Icon Verified purchase


found this helpful.

I just received two of these boxes today. I put them in my 2017 Chevy Camaro. I have 2 Rockford fosgate P 2's and I have a Rockford fosgate T750X amp pushing them. Have them wired at 1 ohm. Man my system sound so good. If you dont have much trunk space this is the way to go. And the Rockford fosgate setup is amazing.

By Raymond on February 3, 2023 Checkmark Icon Verified purchase


found this helpful.

Good value

Great box for the value. I have a JL 12w6 in it and it sounds amazing. My one issue was the aesthetics, it arrived looking like it needed a bit more carpeting but for the price and sound quality i’ll take it.

By Alex on October 20, 2022 Checkmark Icon Verified purchase


found this helpful.

Nice box

Good quality good solid box sub sounds awesome in this box

By Mike on December 12, 2023 Checkmark Icon Verified purchase


found this helpful.

Great Box!

I have an Alpine Type-X 12" Subwoofer that I had put in a ported box. It sounded great and it hit hard. Problem was that it was taking up to much of my trunk space and I wanted some back so I started searching for a sealed box.
I purchased this box after looking through several reviews of the boxes on Amazon. They appeared to be hit or miss. This box appeared solid and a different sized box from this manufacturer had good reviews so I gave it a try.
The box arrived well packaged and in perfect condition and appeared to be well constructed. The Atrend badge easily unscrews off if you would like to remove it. It had enough room on it that I was able to mount my Eclpise ZA1200 directly on to it. Great box for the price.
Now that I have my sub in the sealed box, I have some more trunk room although I sacrificed some bass (not as loud as it was) but I was expecting that to happen.
It is a great box!

By Martin on July 28, 2017 Checkmark Icon Verified purchase


found this helpful.


I put my older P2D4-12 in this after gluing polyfill to the insides. Hits harder than I remember it hitting before. Attend makes SOLID boxes.
Thank you.

By Sozo on November 11, 2017 Checkmark Icon Verified purchase


found this helpful.

Quality craftsmanship, and a great price!!!

This Atrend 12SQL is a great box for any budget build. Even though it's listed as medium duty I've sampled various 12" subwoofers in this box with different amplifiers at various power levels and not once did it disappoint. This is a box you can install with little or no modifications and be pleasantly happy with the lows it produces.

By David on June 15, 2023 Checkmark Icon Verified purchase


found this helpful.


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