Polk Audio 5-Pack Black Compact Home Theater Audio System - Satellite Digital Premium Sound System. Everything you need for explosive surround sound home theater thrills (except the subwoofer). 5-piece system includes a center channel speaker, front speakers and surround speakers. Add the sub that's right for you, and get blown away with fun. Features: The silk dome tweeter delivers a classic, clear, detailed Polk performance, with pinpoint imaging and smooth highs that are never tiring Injection molded composite cones, tuned with our Dynamic Balance® technology, deliver a flatter frequency response with transparency, sharp detail, and the ability to play loud with no strain at all Extra-rigid steel plates reinforce the beautiful curves of the Satellite speakers, resulting in acoustically inert enclosures free from internal resonances and any audible coloration, for more lifelike audio detail Time Lens® technology aligns the acoustic centers of the tweeter and mid-bass driver on the same spatial plane for superior imaging, while an acoustic lens incorporated in the grille smooths the tweeter's frequency response The unique curved enclosure design employs non-parallel surfaces to strengthen the acoustically inert enclosure and deliver less audible coloration from internal surface resonances Because of its Extended Linear Motion motor structure, the moving parts of the drivers used in the Satellite Series can move farther, more smoothly, in a smaller space than any other speaker driver in an enclosure this size, achieving the kind of dynamic response (clarity, volume) you'd expect from much larger speakers PowerPort® bass venting is Polk's patented design for smoothly transitioning the air flow from the port into your listening area, eliminating turbulence and distortion, for bigger, more efficient, deep bass impact. Adding a PowerPort to a compact loudspeaker allows it to achieve deeper bass, for better blending with your subwoofer, than ever before Polk's.