2018-up Jeep Wrangler JLU Unlimited Sub Box Shallow Downfire Ported


2018-up Jeep Wrangler JLU Unlimited Sub Box Shallow Downfire Ported

This Jeep Wrangler Unlimited JLU sub box was designed for those who want big bass but want to keep their cargo space in the back.

This design has 1.12cuft of airspace and 4 3/4″ of mounting depth, or 5 1/2″ with our metal back plates. This is a great enclosure for a single of 10 or 12 ported. The subs mounting surface is 2″ from the floor, which will allow for a lot of travel from some big subwoofer. A downfire box works best in an open air vehicle like a Jeep because the loading effect of the downfire design helps to get a little more output since there is no cabin gain in an open air vehicle like this. The edge of the box closest to the rear is designed to be sealed off to the floor, forcing all the sound towards the front of the cab. This works GREAT when the hard top is off or with a soft top on the Jeep.

The box is only 7″ tall overall, so very little cargo room is lost and you can pile your luggage right on top of the box without worrying about hurting it.

The enclosure fits up tight against the back of the seat, almost side to side between the fenders, and up to where the floor hinges up. So full access to the cargo bin is still available with this sub box. You get big bass and get to keep most of your cargo space. And the Downfiring subs are protected from cargo, just another bonus.

This is a ported subwoofer box. Ported subwoofer boxes are for customers who want louder, deeper bass with the lower bass more pronounced. Because of the ported design, the bass will not be as tight and punchy as a sealed box, but there is double the bass of a sealed box with the same subs. A sealed subwoofer box has a tight and punchy bass that is more articulate and more true to the music with a more natural sound. If tight, punchy bass is what you want then our sealed box will be what you want.

This is our ported design. This design is for maximum airspace and the airspace of the box can be reduced if desired. Our ported boxes are designed according to your subwoofers specifications. No two boxes will really be alike. At checkout, there is a Comment box, please give us the model number of your subs and we will build the box as needed. We tend to tune our boxes deep, around 34-37hz. If you have any specific requests please feel free to let us know.

This box is made out of 3/4″ MDF and is fully carpeted in matching carpet. The nickle plated spring loaded speaker terminals are mounted on the back of the box and the speaker wires are soldered on for a solid and reliable connection.

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Contact Us About Your Options (This is only if your order requires some advanced customization. If you need a customization fee, we’ll let you know).

  • We use Stinger wire on all of our boxes.
  • Please enter the Brand and Model of the subwoofers you will be using.
  • $0.00

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Additional information

Weight 45 lbs
Dimensions 38 × 7 × 16 in
Total Volume (CuFt)

Mounting Depth

Fit Location


Box Finish

Number of Speakers

Speaker Sizes