Ultraslim 68" active subwoofer tucks under most seats to add real lowend without sacrificing space. ^^ Builtin amplifier matched to the driver for clean, efficient bass with simplified wiring. ^^ Lowprofile aluminum enclosure helps with heat dissipation and durable mounting. ^^ Linelevel and speakerlevel inputs for easy integration with factory or aftermarket head units. ^^ Ideal bass upgrade for sedans, trucks, and SUVs where a traditional sub box wont fit.