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Bbox by Atrend A151-12CP

Single 12" Subwoofer Enclosure for 1999-2007 Chevy/GMC Trucks

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Bbox by Atrend A151-12CP

Single 12" Subwoofer Enclosure for 1999-2007 Chevy/GMC 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.



Don't see the accessory you're looking for?
View all available accessories for the Bbox by Atrend A151-12CP.

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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:

  • Single 12" Subwoofer Enclosure
  • Designed specifically for 1999-2007 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: 0.93 cubic feet (per chamber)
  • Authorized Internet Dealer
  • 1-year Manufacturer's Warranty

Note: Installs under the Driver's side rear seat with Subwoofer 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.
0.93 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

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



Great Value

March 3, 2015

The box was delivered within the estimated time and I was impressed at the quality of the box, it is a well made box. The fitting under the rear seat of 2003 GMC Sierra Extended Cab is not perfect for the box sits a little bit too high thus the rear seats rest on the box. For my case no one sits in the rear too often so no loss there.

19 of 22 found this helpful

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cape may court house ,nj


January 1, 2016

At the time of my first review I was very unhappy with this enclosure. I decided to change subs from a Alpine swr-12d2 to a Pioneer TS-SW3002S4. Changing to a flat piston shallow mount sub made all the difference, now im thinking of porting the enclosure to pioneers port specs Ive even considered a dual 12 box with 2 pioneers. There is only so many options due to a lack of space in a 02 Silverado extended cab and removing the back seat isnt one so i do recommend this box just make sure u use the right sub which should be a shallow mount

0 of 0 found this helpful

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Springfield, TN

Bad Experience

October 19, 2015

This product blew my sub woofer, because it did not fit my truck as advertised. I tried to exchange the box for a different one, but was told I could not because of the holes drilled in from the sub. How else are suppose to test it to see if the product works properly. I would not recommend this product to anyone.

0 of 0 found this helpful

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cape may court house,nj

poor design

August 31, 2015

Purchased this box for a 02 Chevy Silverado extended cab. My Alpine swr-12d2 just fit in the box and it fit perfectly under the seat. The box itself doesnt leave enough of a gap between the sub and floor so the sub hits the floor when it extends. It hits the carpet hard enough to leave a depression in the carpet. This means it will ruin the sub. I would only recommend this box if you will be using a sub with very little excursion or its a cheap sub and ruining it isnt a major concern. Overall its a poor design and you shouldnt waste $$$ on it.

1 of 2 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

Your Price $139.99

NVX VSW124v2

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

Your Price $139.99

High-Performance NVX Speaker Wire

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

Your Price $39.99

Belva CCA Speaker Wire

12 Gauge 7 Meter (23 Ft) Speaker Wire (CCA)

Your Price $14.99

20 ft. of NVX SDTK20 Trunk Kit

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

Your Price $53.99

NVX SDBP40 - 40 ft. (10% More Than Competition)

40 ft. Bulk Pack of Sound Dampening Material

Your Price $97.99

20 ft. of Dynamat Xtreme Trunk Kit

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

Your Price $97.97

NVX SDRLR1 Universal Roller Tool

Install your sound damping with the SDRLR1 tool

Your Price $7.99

Browse 4 questions and 9 answers
Hide answersShow all answers | Sort by
Why did you choose this?
Sonic Electronix Store
It fits my truck
cody o on Oct 2, 2016
awesome for a smaller space
shawn d on Apr 26, 2015
it looks like a good value and will fit both my truck and my sub
Dan D on Oct 24, 2015
Reasonable price and have had good service with Sonic
Edgar K on Apr 22, 2015
WILL THIS FIT IN A 2002 extended cab s10?
A shopper on Jul 28, 2015
Best Answer: If you enter your make n model in the search bar and it shows it it should. Being I have a full size chevy extended cab no problem and it fits small. Also go to dimensions then measure width n height available in truck. You can also look on bbox site for help also.
Reply · Report · Edgar K on Jul 28, 2015
· Add Answer · I Have This Question Too (0)
Will this box fit under the right rear passenger seat of a 1999 Silverado extended cab?
A shopper on Dec 4, 2014
Best Answer: Hello,

"Installs under the Driver's side rear seat with Subwoofer facing down. "
Reply · Report · Customer SStaff on Dec 6, 2014
· Add Answer · I Have This Question Too (0)
will this fit in a single cab 99 silverado without the seat being too far up?
A shopper on Dec 1, 2014
Best Answer: No that will not work for your application. That box is made to go under the back seat of an extended cab chevy. 99 to 07.
Reply · Report · david D on Dec 2, 2014
· Add Answer · I Have This Question Too (0)

Product Summary


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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: Bbox by Atrend A151-12CP