2004-2008 Pontiac Grand Prix Sub Box Ported


2004-2008 Pontiac Grand Prix Sub Box Ported

The 2004-2008 Pontiac Grand Prix has a huge trunk but there is no reason to loose all that space because of a subwoofer. This box is as wide and tall as I can make it so it is not as deep as most traditional sub boxes. This box is only 15” deep at the bottom and fits up nice and tight to the rear of the back seat. It is 2.5cuft of airspace and has 8 1/2” of mounting depth and is perfect for a couple of 10s or a single 12 in this ported box. If there is anything special you’d like done let me know and I will get it made for you.

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 trunk 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).

Additional information

Weight 45 lbs
Dimensions 36 × 15 × 15 in
Total Volume (CuFt)

Mounting Depth

Fit Location


Box Finish

Number of Speakers

Speaker Sizes


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