JL Audio W6 series subwoofers are not very forgiving if the enclosure is not built right. More or less airspace than required will hinder the performance. That's why at Custom Sounds & Tint we build enclosures to the manufacturer's specifications. The result is impeccable sound quality, very accurate reproduction of low frequencies and one heck of a system. This truck sounds absolutely amazing and got not one, but TWO W6 subs! Good looking box and fits right under the seat while retaining all of the leg room.