With Kicker Q-Class subwoofer enclosures, you can enjoy front-row concert sound right out of the box. A stylish L7 series square subwoofer is pre-loaded into an enclosure that perfectly tunes the sound. Get a vented subwoofer enclosure for maximum boom or choose sealed Kicker enclosed subwoofers if you want the tightest notes. Each box is RoHS-compliant and is shaped for efficient installation in a variety of cars and trucks. OnlineCarStereo.com has a 60-day guarantee on all Kicker products.