Sonic Sub Box: 1SL12-1.0 (GRAY CARPET)

Single 12" Sealed MDF Enclosure


GRAY CARPET VERSION: 3/4" Medium Density Fiberboard construction • fully carpeted • 1.0 cubic ft internal volume • gold speaker terminals

Learn more about the 1sl1210-gray

Good news and a little bad...

This item has been discontinued

But you may be interested in the newest model that's available.

12sql thumbnail

Atrend 12SQL

OUR PRICE: $69.99

View item


Sonic Sub Boxes

Authorized dealer

  • Single Sealed 12" Enclosure
  • 3/4" High Quality MDF Material machine-cut to perfection
  • Professionally Sealed, caulked, and carpeted
  • Internal Volume: 1.0 cubic feet
  • Durable GRAY carpeting
  • Terminal cup installed with gold posts (with banana clip option too!)
  • Dimensions: 13"H x 16"W x 12"D
  • 30 Day return policy

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
Total Box Volume
1.0 cubic feet
Wood Thickness
Number of Terminals
Terminal Type
Binding posts
Box Exterior Color
Box Finish
Warranty and Return Policy
Parts Warranty Duration
Not warranted
Labor Warranty Duration
Not warranted
Warranty Provider
Sonic Electronix

Item Details


Model Number:




Internal SKU:


Internal Product ID:


Customer Ratings & Reviews

5 star
4 star
3 star
2 star
1 star


Customer Reviews

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Good choice

I ordered 2 of the boxes shown. They came 2 days after the order with no shipping damages. I'm mostly satisfied with the product and it is MOSTLY SEALED. There were a bunch of gaps and missed spots that should definitely not be there, but its not hard to put some neutral cure silicone into it. Other than that it has great construction and looks like it will hold together.

By AdamR on September 16, 2010


found this helpful.


Purchased this box to hold a kicker comp 12" sub. Don't let the price fool you, this thing is sturdy. Simple installation of speaker port, and it was ready to go. Recommended.

By Jon on November 7, 2008


found this helpful.

Quality for a bargain

I would highly recommend this box to anyone who is looking for a good quality sealed sub woofer enclosure. It is built with high quality materials and has not cracked or chipped over the 6 months i have had it so far. The sound quality is great and it has no leaks or rattles. The materials alone that are needed to make this box yourself cost twice as much as this complete ready to go box does.

By Natedogg on March 18, 2013


found this helpful.

My sub box review

I don't need to say anything about this product, except one thing.. I ripped this company off! The money I paid was way way way less than what I should have paid for the quality of product I received! I recommend this and if the rest of their products are anywhere near as good as that box, then you're in for a treat!

By Klaus on November 17, 2009


found this helpful.

Can't Complain

This box is as simple as it gets. And the gray looks awesome with a nice black sub. Terminals were kinda loose, but thats nothing a socket cant fix. The only thing is if your looking for a completely air tight seal, i recommend sealing the terminal with some good silicone, as well as the main hole, you wont regret it. For the price, I'll never sway from this box.

By Tyler on February 20, 2012


found this helpful.

Seems fine, great deal!

Bought it last week. Terminal cup was not sealed hardly at all, and one of the posts were loose, but to have a properly sealed enclosure you have to seal the terminal yourself anyways. So after tightening the post, which was a breeze, and sealing the terminal cuwtt35824 and mounting surface for the sub all with multipurpose caulk and letting it sit for a day or so, its completely air tight. Seems fine, havent hooked it up yet but there shouldnt be an issue. Worth the price for sure, and very sexy with a nice black sub too!

By Tyler on December 23, 2011


found this helpful.

Nice value but weak terminals

I got this box because it was cheap. It was sturdy and well made. Carpet was well done. I would've preferred a bit more caulking around the edges, but it was still sealed. Well worth the price.

Only problem: terminals are weak. The box moved around a bit and then the terminals BROKE when I used banana plugs. Yes... and so the only way is that I have to rely on the screws to pin the wires in place. It barely holds, but I was REALLY disappointed.

Good value. Just dont use the banana plugs unless your sub NEVER moves around.

By Thomas on October 8, 2009


found this helpful.


gets the job done.

By dustin on December 30, 2009


found this helpful.

Awesome sealed Sub Box

I bought this sealed 12" sub box 6 months ago. I have been pounding it and it has held up perfect. I have absolutely no complaints. It was a great value and has stood the test of time. highly recommended. A+++

Thanks alot!

By Sir-X-Loin on March 2, 2009


found this helpful.

No complaints so far

Great box, very rigid. No construction problems but joints could be a bit better sealed.

By Burt on February 26, 2009


found this helpful.


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