BMW's audio systems have come a long way in the last few years, but they still lack in the low frequency department. The underseat factory woofers are small and can only do so much. If you're seeking a real sub-bass solution with powerful output, excellent balance and impressive low-frequency extension, this Stealthbox® was made for you. Our 3-Series Stealthbox® design puts our patented low-profile TW5 subwoofer technology to excellent use, housing two 13.5-inch drivers in a sealed fiberglass enclosure with individual driver chambers. You'll have plenty of trunk space to spare... enough to fit a couple of golf bags or luggage for a long road trip. And with the sound quality this Stealthbox® delivers, you will enjoy every mile on those road trips.

THE HARD DATA:
Contains two 13TW5-3 subwoofers in a sealed enclosure. 1200 Watt power handling. Wired for 3 ohm stereo (two individual 3 ohm terminals), can be wired as 1.5 ohms mono. Installs in the trunk against the back of the back seats. On vehicles equipped with folding rear seats, the enclosure will prevent access between the trunk and cabin.

Click here to Download the Installation Manual (PDF). Adobe Reader® Required