Why Choose Crutchfield?
Great gear and expert advice
Our experts help you pick the ideal gear for your needs.Meet our advisors
Free tech support for the life of your gear.Read about our one-on-one expert help
You may return items that are complete and like new for any reason within 60 days.See the details of our return policy
Earn one point for every dollar you spend and use those points to save on future purchases.Get full details on Crutchfield Rewards
Deep discounts on car installation gear
We offer vehicle-specific installation instructions, dash kits, wiring harnesses, and speaker accessories at deeply discounted prices with car stereo and speaker purchases. Available for most vehicles.Learn more
Trusted since 1974
Our customers have trusted us with their business, and they’ve helped us win awards for our service.Check out our most recent awards
The manufacturer’s warranty always applies.See more details
Type 1 single 12" truck box
Item #: 044T8512SE
This item is no longer available.
Our take on the Q-Logic QLT-.8512SE by Crutchfield's Steven Johnson
Q-Logic enclosures take the guesswork out of box-building, so you can enjoy great bass without the time-consuming process of constructing your own enclosure. The QLT-.8512SE accommodates one 12" subwoofer in a sturdy housing made entirely of non-resonant medium-density fiberboard. This box features reliable locking-joint construction, and is impeccably upholstered with durable gray carpet.
Since subwoofers' basket design and bolt patterns vary by brand, Q-Logic's ingenious QxE seal ring allows you to customize the box opening for virtually every woofer available. Plus, a cool-looking, one-piece grille works even with woofers that have large roll surrounds, so you get solid protection and sharp looks.
The box comes with a grille (with screws), a set of spring posts, polyester fiber stuffing, and speaker leads with quick-slides for easy connection to your woofer.
This box is designed to fit behind the seat in your pickup. Some truck boxes may not fit in a standard cab with the seat pushed all the way back, so please measure the planned installation area to ensure fit.Key Specifications:
- for one 12" subwoofer
- 0.85 cubic feet internal volume
- width: 22-1/2"
- height: 15-3/4"
- bottom depth: 8-3/8"
- top depth: 5-3/16"
- 1-year warranty
What's in the Box:
- Single truck-style enclosure
- Plastic grille
- Two 1-1/2" self-tapping screws (installed in grille)
- QxE-Ring (installed)
- 2' length of speaker wire (with 0.205" female quick slides on both ends)
- Eight 1" self-tapping screws
- Polyfill batting (22" x 13")
- Instruction/Warranty sheet
Features and Specs
|Number of Boxes||1|
|Number of Speakers Per Box||1|
|Cutout Diameter or Length (inches)||11 3/8|
|Maximum Speaker Depth (inches)||5-7/8|
|Box Volume (cubic feet)||0.85|
|Second Depth (inches)||5-1/4|
|Wood Thickness (inches)||5/8|
|Speaker Wire Connectors||Spring Post|
|Box Color||Dark Gray|
|Parts Warranty||1 Year|
|Labor Warranty||1 Year|
Materials: The box is constructed of 5/8" MDF (medium-density fiberboard), with a second MDF panel adhered to the back of the front panel to provide the mounting surface for the woofer. MDF resists flexing and has anti-resonant qualities.
Design: For strength, Q-Logic uses a full dado groove on the front, back, top, and bottom panels. The side panels are glued, then locked into these grooves. The edges of the front, back, top and bottom use mitered joints, so there's 50% more surface area for the special glue that bonds them. The side panels of the box are recessed 0.5". The enclosure is covered with durable gray carpet.
QxE-Ring: The QxE-Ring is a multi-diameter woofer mounting adapter which also seals the woofer into the enclosure. The QxE-Ring has a series of rings around the outside to help center the woofer, and hash marks to help align the woofer's mounting holes. If the mounting diameter of the woofer is 11-1/8" or less, the woofer can be installed without trimming. For woofers with a larger mounting diameter, a portion of the QxE-Ring can be trimmed off, allowing for an extra 1/4" in woofer mounting diameter.
Plastic Grille: The one-piece plastic grille fits into outer edges of the enclosure opening and is held in place with two self-tapping screws. The grille offers nearly an inch of "headroom" to accommodate woofers with large roll surrounds. Note: The grille adds approximately 3/4" to the overall depth of the enclosure when mounted.
External "Top Hat": Mounted to the rear of the enclosure, the External Top Hat is an oval-shaped plastic insert which extends the woofer mounting depth by nearly 3/4", allowing more woofers to fit into the enclosure. The cutout for the insert is 7-1/2" wide and 6" high. The external panel is 9-1/4" x 7-5/8" (oval), but protrudes less than 1/4" from the back panel.
The spring posts, located on the rear of the enclosure, will accept bare wire,
pin connectors, banana plugs, and dual banana plugs.
Brackets: Brackets (not included) are recommended for more secure mounting.
Our Product Research Team
At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team. They verify what’s in the box, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.