Garage
Shop

See all parts that fit your 2021 Countryman

Atrend 12SQ

Empty Single 12" Small Sealed Subwoofer Enclosure

Atrend
Shop all Atrend
Out of stock
highlight-star-icon

• 12" Single Small Sealed Subwoofer Enclosure
• 3/4" Medium Density Fiberboard (MDF) construction
• Completely miter and dado end panels
• Premium carpeted finish
• Total box volume: 0.75 cubic feet

Learn more about the 12sq
Universal fit Icon

Universal – fits most vehicles.

Similar items | Update vehicle | Vehicle store
List price $89.99
Thanks , You Pay:
-6%

$84.95

 with warranty
Starting at $15/mo or 4 payments of $22 Buy now, pay later and installment payment plans are offered by Afterpay and Affirm. Learn more

Heads up

Your vehicle can use this product in multiple locations. Only a quantity of one can be selected from the product page. You will have the option to adjust the quantity within your cart.

Quantity
Out of stock - Order risk-free, cancel any time.
Brand new

Acima Logo

No Credit Option

Flexible Lease Payments

Early Purchase Options

Quick Approval Decision

Extend logo

Keep your product protected longer! Extend the warranty after the manufacturer warranty expires. 

  • Hassle-free immediate replacement within minutes!
  • Easy online claims 24/7
  • Covers product breakdowns and failures
Swoosh Icon Icon of Swoosh

For over 25 years, we've been your X-Factor – the team dedicated to having the biggest impact on your shopping experience!

Award winning icon
Award-Winning Service
Shipping icon
FREE Shipping Orders $49+
60 days return policy icon
60-Day Easy Returns
lowest price guarantee icon
Guaranteed Lowest Price
inHouseExpert
In-House Experts
NVX - Worth the Envy - Direct to Consumer Car Audio

Loading...
DMH-1800NEX main

Pioneer DMH-1800NEX

6.8" Double DIN Touchscreen Digital Multimedia Receiver with Bluetooth, Apple CarPlay, Android Auto, and SiriusXM Ready

59
-19.05%

$339.99

List price $420.00

UTE-73BT main

Alpine UTE-73BT

Single DIN Digital Media Receiver with Bluetooth

44
-16.69%

$149.95

List price $180.00

CV15BT main

Cerwin-Vega CV15BT

Single Din Digital Media Receiver with Bluetooth

3
Limited time!
DMH-W3050NEX main

Pioneer DMH-W3050NEX

6.8" Double DIN Touchscreen Digital Multimedia Receiver with Bluetooth, Wireless Apple CarPlay and Android Auto, and Built-in Alexa (Sirius XM Ready)

1
-24.20%

$469.99

List price $620.00

Club 322F main

JBL Club 322F (SPKCB322FAM)

150W Peak (50W RMS) 3.5" Club Series 2 Way Coaxial 3-ohm Speakers

1
-27.29%

$79.95

List price $109.95

CVP8 main

Cerwin-Vega CVP8 (Sold Individually)

350W Peak (170W RMS) 8" CVPRO Series Pro Full Range 4-ohm Speaker

-16.67%

$49.99

List price $59.99

MVH-S322BT main

Pioneer MVH-S322BT

Single DIN Digital Media Receiver with Bluetooth and Amazon Alexa

7
-13.34%

$129.99

List price $150.00

Limited time!
DMX709S main

Kenwood eXcelon DMX709S

6.8" Double DIN Touchscreen Digital Multimedia Receiver with Bluetooth, Apple CarPlay, Android Auto (Sirius XM Ready)

39
-33.50%

$399.00

List price $600.00

Limited time!
iLX-W670-M main

Alpine iLX-W670-M

6.75" Double DIN Touchscreen Digital Multimedia Receiver with iDataLink Maestro Support, Bluetooth, Apple CarPlay and Android Auto (SiriusXM Ready)

126
-30.01%

$349.95

List price $500.00

KMM-X705 main

Kenwood eXcelon KMM-X705

Single DIN Digital Media Receiver with Bluetooth, Built-in Alexa (Sirius XM Ready)

6
-20.40%

$199.00

List price $250.00

Description


Atrend brand icon

Authorized dealer


Atrend 12SQ

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 using only the most efficient engineering and manufacturing processes.

All of Atrend and Bbox subwoofer enclosures are engineered and constructed to be the strongest on the market. Atrend's outside panels feature signature Miter and Dado construction, which adds extra reinforcement and structural integrity to subwoofer enclosures. Ultimately, these construction techniques provide unsurpassed build and sound quality in Bbox enclosures.


Product Details:

  • 12" Single Small Sealed Subwoofer Enclosure
  • Durable 3/4" Medium Density Fiberboard (MDF) construction
  • Mitered edge construction provides cleaner finish
  • Miter joints feature over 41% more surface area
  • More surface area translates into a stronger bond
  • Dado joints offer 80% increase in surface area
  • Built using trick glue for up to 3600 PSI holding ability
  • Premium charcoal carpet and silver spring-loaded terminal cups
  • Maximum subwoofer mounting depth: 9.53"
  • Subwoofer cutout diameter: 11.13"
  • Total box volume: 0.75 cubic feet
  • Dimensions: 13.50" L x 13.50" H x 10.50" W
  • Authorized Internet Dealer
  • 1-year Manufacturer's Warranty

This product is temporarily out of stock. May we recommend...

MDFS10 small

Single 10" Sealed MDF Subwoofer Enclosure (Belva MDFS10)

• 0.77 cu ft Sealed Enclosure
• 3/4" Medium Density Fiberboard Construction
• Durable Black Carpeting
• Pre-Lined with Poly-Fil
• Gold Speaker Terminals

(121)

$59.99

List price $99.99

NE101S small

NVX NE101S

• 10" Single Sealed Subwoofer Enclosure
• 3/4" Medium Density Fiberboard (MDF) construction
• Internal box volume: .65 cubic feet
• Premium Black Carpet with Black NVX Logo

(4)

$69.99

List price $83.99

MDFS12 small

Single 12" Sealed MDF Subwoofer Enclosure (Belva MDFS12)

• 3/4" Medium Density Fiberboard Construction
• Durable Black Carpeting
• Pre-Lined with Poly-Fil
• Gold Speaker Terminals

(172)

$69.99

List price $69.99

MDFD12 small

Dual 12" 3/4 MDF Sealed Subwoofer Enclosure (Belva MDFD12)

• 3/4" Medium Density Fiberboard Construction
• Durable Black Carpeting
• Pre-Lined with Poly-Fil
• Gold Speaker Terminals

(121)

$99.99

List price $119.99

12AME small

Atrend 12AME

• 12" Single Shallow Sealed Subwoofer Enclosure
• 3/4" Medium Density Fiberboard (MDF) construction
• Shallow construction and downward firing design
• Miter and Dado construction
• Premium carpet finish
• Silver spring loaded terminal cups
• Glued and braced with fasteners
• Total box volume: 0.47 cubic feet

$75.40

List price $79.99

NE151S small

NVX NE151S

• 15" Single Sealed Subwoofer Enclosure
• 3/4" Medium Density Fiberboard (MDF) construction
• Internal box volume: 2.10 cubic feet
• Premium Black Carpet with Black NVX Logo

$89.99

List price $107.99

12DM small

Atrend 12DM

• 12" Dual Medium Sealed Subwoofer Enclosure
• 3/4" Medium Density Fiberboard (MDF) construction
• Miter and Dado construction
• Premium carpet finish
• Silver spring loaded terminal cups
• Glued and braced with fasteners
• Total box volume: 2.36 cubic feet

$109.99

List price $149.99

NE121S small

NVX NE121S

• 12" Single Sealed Subwoofer Enclosure
• 3/4" Medium Density Fiberboard (MDF) construction
• Internal box volume: 1.00 cubic feet
• Premium Black Carpet with Black NVX Logo

(1)

$89.99

List price $99.99

NE102S small

NVX NE102S

• 10" Dual Sealed Subwoofer Enclosure
• 3/4" Medium Density Fiberboard (MDF) construction
• Internal box volume: 1.20 cubic feet
• Premium Black Carpet with Black NVX Logo

(3)

$119.99

List price $143.99

10TK small

Atrend 10TK

• 10" Single Truck Sealed Subwoofer Enclosure
• 3/4" Medium Density Fiberboard (MDF) construction
• Universal truck (wedge) enclosure design
• Miter and Dado construction
• Premium carpet finish
• Silver spring loaded terminal cups
• Glued and braced with fasteners
• Total box volume: 0.62 cubic feet

(4)

$73.99

List price $99.99

Specifications & Details


Box/Enclosure specifications
Subwoofer Size
12"
Subwoofer Cutout Shape
Round / Circle
Box Type
Sealed
Number of Subwoofers
1
Box Style/Shape
Square/Rectangle
Cutout Diameter or Length
11.13"
Maximum Speaker Depth
9.53"
Total Box Volume
0.75 cubic feet
Box Volume (Each Chamber)
0.75 cubic feet
Wood Thickness
3/4"
Number of Terminals
1
Terminal Type
Spring posts (banana clip ready)
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:

Model Number:

12SQ

Weight:

14.00lbs

Internal SKU:

12sq

Internal Product ID:

31990

Customer Ratings & Reviews


Atrend 12SQ thumbnail image

5 star
33%
4 star
50%
3 star
0%
2 star
17%
1 star
0%



Durability
4.5
Value
4.2
Features
4.2
Design
4.4
Usability
4.4

Customer Photos & Videos


Customer Reviews

Sort by:

Loading...

Great for small cars

I bought this box for my soundqubed 12". It was the smallest box I could find that fit a 7" deep sub. Works great. Hits pretty hard with the sub. The inside is sealed well, which is hard to find for a prefab box.

By Adam on September 26, 2015

40 found this helpful


Decent

Arrived dented in the corner and it seems the cut out for the sub is slightly too large. It was for my alpine type r.

By Stephen on September 14, 2017

37 found this helpful


Nice Box

This is a nice box. You're not going to get a ton of thump out of this box. It just isn't going to happen. I have a dayton HO 12 in it and it puts out good base with a ton of musicality. It's more of a sound quality setup. No complaints here.

By Brendan on November 2, 2015

34 found this helpful


Small pro box love it

This is my 4 order from sonicelectronix love the quility of products and price thank you

By jorge on July 21, 2023 Checkmark Icon Verified purchase

32 found this helpful


Good box

Has seen three different subs and awaiting a fourth. One spot is starting to split from the screws but other then that it's great. I stuffed it with poly fill

By Anonymous on July 4, 2019 Checkmark Icon Verified purchase

33 found this helpful


Great for small cars

I bought this box for my soundqubed 12". It was the smallest box I could find that fit a 7" deep sub. Works great. Hits pretty hard with the sub. The inside is sealed well, which is hard to find for a prefab box.

By Adam on September 26, 2015

32 found this helpful




UTE-73BT small

Alpine UTE-73BT

Single DIN Digital Media Receiver with Bluetooth

(44)

$149.95

List price $180.00

PN2.2000DX small

Soundstream PN2.2000DX

2000W Peak (600W RMS) Class D Picasso Nano Series 2-Channel Car Amplifier with Bass Remote

$129.99

List price $158.99

15KD small

Atrend 15KD

Empty Dual 15" Sealed Enclosure for Kicker L7R and L7S Series Subwoofers

(1)

$169.99

List price $209.99

BWT4LED small

Belva BWT4LED

400W 4" Powersports/ATV/UTV Bluetooth Amplified Speaker Pods with Blue LED Lighting

$69.99

List price $199.99

PSP6 small

Install Bay PSP6

Complete ABS Port Tube Kit - 6" x 11" Port

(1)

$87.99

List price $97.99

DPST12 small

Diamond Audio DPST12

600W Peak (300W RMS) Loaded 11" Spare Tire Passive Subwoofer Enclosure

$389.99

List price $349.99

IBBAF46 small

Install Bay IBBAF46

4" x 6" Foam Acoustic Speaker Baffles

(3)

$11.99

List price $13.99

PN1.6000DX small

Soundstream PN1.6000DX

6000W Peak (1800W RMS) Class D Picasso Nano Series Monoblock Car Amplifier with Bass Remote

$229.99

List price $279.99

S2-W12D2 small

Alpine S2-W12D2

1800W Peak (600W RMS) 12" S-Series Dual 2-ohm Car Subwoofer

(39)

$215.95

List price $320.00

Related Searches


Save up to 10 different vehicles in your garage
Vehicle
Store
Delete

2021 MINI Countryman

2012 Lexus LFA

1986 Ford EXP

1985 Dodge Colt

2009 Buick Allure

1995 Dodge B1500

2020 Mazda 6

2017 Mazda 6

2019 Jeep Compass

2015 BMW 550i

Vehicle
Store
Delete

2025 Can-Am Defender XT HD7

Add vehicle Clear all vehicles
Where to find vehicle info
Are you sure you want to clear your garage?
This action cannot be undone. Confirm
This page was not designed for products.
If you continue, you will be redirected to a category customized for your vehicle. Continue
Loading...
Identify your vehicle and submodel details
  • Owner's manual
  • Vehicle's insurance card
  • Vehicle registration
  • Vehicle produced after 2005: Inside driver's side door
  • Vehicle produced before 2005: Rear passenger doorjamb, glove box, center console, or engine compartment
Car Info Side Door Icon
Vehicle Registration Icon
Vehicle Insurance Icon

Modern vehicles often require specific brackets, wiring harnesses, and mounting solutions. A fit guide ensures:

  • You see only parts engineered for your exact vehicle
  • You avoid incompatible radios, speakers, or wiring
  • Installation is smoother, faster, and frustration-free
  • You get the correct accessories the first time

Whether you're replacing a factory stereo or upgrading your entire audio system, the Fit Finder eliminates uncertainty.