Atrend A152-12CP

Dual 12" Subwoofer Enclosure for 99-07 Chevy Silverado and GMC Sierra Extended Cab Trucks

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Strong, Reliable Enclosures

Engineered and manufactured using only the finest materials throughout the production process. With glued and braced Hardwood MDF construction Bbox offers an affordable high quality enclosure.

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

Bbox vehicle specific enclosures are designed to fit within specific vehicle applications to help minimize the space required and also cleanly integrate into your vehicle without drawing attention.


General Features:

  • Dual 12" Subwoofer Enclosure
  • Designed specifically for 99-07 Chevy Silverado and GMC Sierra Extended Cab Trucks
  • Premium carpeted finish
  • 3/4" Mounting Baffle
  • Hardwood MDF construction
  • Rounded edges
  • Glued and Braced construction
  • Subwoofer mounting depth: 7.25"
  • Box volume: 0.83 cubic feet (per chamber)
  • Also Available in Tough Guard Finish
  • Authorized Internet Dealer
  • 1-year Manufacturer's Warranty
Note: Installs under the rear seat with Subwoofers facing down. Fits 2007 Classic Body Style Only.

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.
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.
Vehicle Specific
Cutout Diameter or Length
The actual diameter of the hole in the subwoofer box. Length is the measured length per side of a square subwoofer or speaker opening.
Maximum Speaker Depth
Your subwoofer or speaker must not exceed this dimension in order to properly mount in this enclosure.
Total Box Volume
The internal volume measurement in cubic feet before subwoofer magnet displacement.
1.86 cubic feet
Box Volume (Each Chamber)
This is the total air space inside each chamber of the empty subwoofer enclosure. By matching this value with the recommended air space of the subwoofer, you will be able to know if the subwoofer will match this box.
0.93 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.
Second Depth
The second depth is used only when the box is slanted or angled. This value is the top measurement and it is measured in inches.
Wood Thickness
The thickness of the wood the enclosure is made of, measured in inches.
Number of Terminals
The number of terminals the enclosure has. Each terminal represents 1 positive and 1 negative.
Terminal Type
Spring clip terminals work best with bare wire connections with small-gauge speaker wire, or pin-type connectors.

Binding post terminals are a sturdier, more versatile type of speaker terminal. Because binding post terminals are are threaded, you can tighten them down against the wire or connector for a tight, clean connection. The most popular style of binding post terminals is known as a "5-way binding post". This type can accept bare wire, or any of the common speaker wire connectors. Binding posts with the option to be used with banana clips are even more versatile

Spring posts are a hybrid of the two. Instead of using a thread and "screwing" them tight, they use a spring to allow the wire to fit and tighten against the terminal.

Spring clips
Box Exterior Color
The color of the enclosure's exterior/outer finish.
Box Finish
The material used on the outside of the box. Most boxes are carpeted to prevent exterior scratches; however vinyl is popular as it can often be color-matched to a near exact look of your leather factory interior.
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.
Chevy Silverado
GMC Sierra

Port Details

Number of Ports
The number of ports the enclosure has.

Warranty and Return Policy

Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider

Summary of Customer Ratings & Reviews

Rating Distribution

5 Star
4 Star
3 Star
2 Star
1 Star

Average Attribution Rating


Maybrook, NY


May 17, 2015

I recommend this custom fit box to anyone looking to add a bass system to their truck. I own this amd when i installed it it fit so snug under my back seat. It definitely is well built and can withstand some serious air push. Only thing was i had to run my own wires from the box to the subs which isnt bad at all. But thats the only thing even remotely close to negative that i could say. All in all best product and phenomenal price. Not to mention shipping was super fast. I think i recieved it withing one week of ordering it and im in ny.

15 of 18 found this helpful

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Goddard, KS

Verified Purchase

March 14, 2016

i bought this and Audiopipe Bass Package: 2-Channel Amp + 12" Subwoofer (AP-PP1000) for my brother in laws 04 silverado and it is loud and fits perfectly.

0 of 0 found this helpful

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Atlanta, Georgia

Very pleased with this box

December 15, 2015

I received my box today and could not wait to put my subs in and put it in my truck. my subs fit into the box beautifully( I was worried about this since I have a deep sub but they fit). I only have two concern/issues, but they aren't the big of a deal. I thought that i would be able to put my amp in the middle on the bottom but nope, the box fits the truck perfectly with no room to spare. My other concern/issue is the plug-ins for the speaker wire. I would have liked to see a little bit bigger of a plug-in for wires but i made it work. Overall I am very satisfied with my purchase.

0 of 0 found this helpful

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glenn heights, TX

Verified Purchase
Decent fit

October 14, 2015

This box fits good under the seat of my 04 silverado ext cab. I do wish it was a bit longer and wider just to give it a bit more space inside. I put 2 hifonics 12's in it and the sound great. The any is sturdy and can fit anything less than 6 1/2" mounting depth.

0 of 1 found this helpful

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Accessory Tools and Products

Accessories added

NVX VSW122v2

600W RMS 12" VS-Series Dual 2-ohm Car Subwoofer

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NVX VSW124v2

600W RMS 12" VS-Series Dual 4-ohm Car Subwoofer

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Browse 10 questions and 16 answers
Hide answersShow all answers | Sort by
Why did you choose this?
Sonic Electronix Store
It's nice and I like it
Tyler J on Jun 9, 2017
For my 2002 Silverado extended cab
Keonta W on Feb 24, 2017
LAYLA E on May 23, 2017
Size and value
YEVETTE C on Nov 25, 2016
Where would I mount the amp?
Tyler L on Dec 22, 2014
· Add Answer · I Have This Question Too (7)
box says 6.5 inch mount depth will the rockford fostgate p3 fir if its mounting dept is 6.5....?
anthony k on Feb 17, 2016
· Add Answer · I Have This Question Too (5)
Does this fit the Suburban (same model years)?
tom s on Dec 9, 2014
· Add Answer · I Have This Question Too (2)
how well does it fit under neath the back seat and does face down?
A shopper on Nov 5, 2014
Best Answer: The seat overhangs the box by about 2" on the front, and about 3" each side, as for it being a down firing box just pay attention to sub mounting depth and cone excursion. Overall it is a very clean application and leaves plenty of foot room for passengers that end up sitting in the back.
Reply · Report · Graydon D on Nov 10, 2014
· Add Answer · I Have This Question Too (1)
the heading says 99-07 then in the notes is sasy 2007 only which is it?
Reuben L on Sep 6, 2014
Best Answer: Sorry about the confusion! This box is compatible with 1999-2007 vehicles.
Reply · Report · Julia CStaff on Sep 6, 2014
· Add Answer · I Have This Question Too (1)
I'm new to aftermarket car audio. my question is. will this box fit my Punch P32D2-12 Shallow mounts?. The truck that its intended for is a 02 GMC 2500hd extended cab. If not could you refer me to a box that will, and is there a ported/vented option box. thank you.
Juan P on Sep 5, 2016
Best Answer: I am not sure, I put it in my 04 GMC Sierra 1500 and it works great. My bro put one in his 06 same make/model
Reply · Report · Traci M on Sep 7, 2016
· Add Answer · I Have This Question Too (0)
I have a Kenwood KAC-7205 amp. I'm thinking about purchasing 2 12" Kicker C124 subs. The enclosure is sealed down firing .89 ft^3 per sub, which I know is slightly smaller than spec for the sub. I'm looking for clean crisp bass. I could careless about boomy bass. Is this a good setup? Best wiring route for optimum performance?
Tyler L on Dec 30, 2014
Best Answer: Hi Tyler,

The volume is considerably low, but can be remedied by lining the walls with PolyFil. A Shallow Mount subwoofer is the intended subwoofer for this enclosure, but we too like the idea of a Full Sized woofer.
In regards to wiring, the Kicker C124 is a Single-4ohm subwoofer, so there isn't any special wiring options. You can Only give each subwoofer its own channel. You will not 'magically' get more power or better performance from a different method. Novice enthusiasts will suggest to bridge the amp, but this will do nothing, because the impedance to power ration will be the same. So, keep it simple, and give each sub its own channel =] !
Reply (1) · Report · Customer SStaff on Dec 30, 2014
· Add Answer · I Have This Question Too (0)
Is this box only for shallow mounts or can I put full sized 12s in?
A shopper on May 30, 2015
Best Answer: Hello,

That is a bit relative. If the "full sized 12s" are shorter than the Subwoofer mounting depth of 6.5" , then yes of course they will fit. Please plan accordingly.
Reply · Report · Rick MStaff on May 31, 2015
· Add Answer · I Have This Question Too (0)
Does this fit in a 2006 Chevrolet avalanche?
A shopper on Dec 11, 2014
Best Answer: Hello,

Unfortunately, it will not. We currently only carry a 10" Dual Subwoofer Enclosure for your vehicle, the Bbox by Atrend A192-10CP .
Reply · Report · Sonic Electronix SStaff on Dec 14, 2014
· Add Answer · I Have This Question Too (0)

Product Summary


Model Number






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: Atrend A152-12CP

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Atrend A152-12CP

Dual 12" Subwoofer Enclosure for 99-07 Chevy Silverado and GMC Sierra Extended Cab Trucks


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NVX VSW122v2

600W RMS 12" VS-Series Dual 2-ohm Car Subwoofer


High-Performance NVX Speaker Wire

25 ft. of True Spec 12 Gauge EnvyFlex Speaker Cable/Wire (100% Oxygen-Free Copper)


20 ft. of NVX SDTK20 Trunk Kit

Keep your trunk from rattling and improve bass quality by using a sound dampening trunk kit.



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