Q-Logic enclosures are famous for their musical performance and their unbeatable construction. Thanks to reliable locking-joint construction and an exceptionally strong adhesive, these boxes are virtually indestructible.

Made of rugged 3/4" fiberboard (which resists flexing and has anti-resonant properties), these boxes are covered with durable gray carpet. The spring clips will accept bare speaker wire and pin connectors. Polyester fiber stuffing and screws are included. (Mounting hardware and grille not included.)

Perfect for most vehicles, except pickup trucks. This box will fit in trunks, hatchback spaces, and the rear area of most SUVs and vans.

Key Specifications:

  • holds one 12" subwoofer
  • 0.88 cubic foot internal volume
  • dimensions:
    • cutout: 11-1/16"
    • width: 14-11/16"
    • height: 14-1/4"
    • bottom depth: 13-1/2"
    • top depth: 10-3/8"

Why do I need an enclosure?

An enclosure is simply the box that houses your sub; sealed and ported enclosures are the most popular types. A sealed enclosure is usually smaller in size, sacrificing a little volume level to deliver more accurate bass. The ported enclosure features a vent which allows bass waves to escape from behind the mounted sub, augmenting the bass coming off the front of the sub. Ported boxes are louder, bigger, and a little less accurate. Every sub works best in the size and type of enclosure that's recommended by the manufacturer, so make sure you match your sub with the right box.

Hands-on research

What's in the box?

Download owner's manual

  • Single hatchback-style enclosure
  • One 23" length of speaker wire (with 0.205" female quick slides on both ends)
  • Eight 1" self-tapping screws
  • 1 Polyfill batting
  • Instruction/Warranty sheet

Product Research



Materials: The box is constructed of 3/4" fiberboard which 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 are joined at an angle, so there's 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.

Spring Clips: The spring clips, located on the right side of the enclosure, will accept bare wire and pin connectors.

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 open the box, verify contents, 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.

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Get everything you’ll need to enjoy your new Q-Logic QLH-CS12

Keep your sub from rolling around in your trunk by using mounting hardware.
Add a grille and keep your sub safe.
Grille Clamps

Grille Clamps

(Front/top mount clamps)

Item #: 125G727KIT


Polyester Fiber Stuffing

Polyester Fiber Stuffing

Make your subwoofer think it's in a bigger box (1-pound pack)

Item #: 027808


Add to Cart
Box Brackets

Box Brackets

Item #: 125B702KIT


Speaker Grilles

Speaker Grilles

(12" waffle style)

Item #: 125G12