It Takes A Receiver Or Amplifier To Operate The Singing Wood T25 Passive, Pair. IMPORTANT: Singing Wood T25 is a passive speaker which needs to be used with an amplifier or receiver. Speaker cables included. ?CLASSIC WOODEN ENCLOSURE? Stylish design speakers made with audio grade MDF wood to reduce cabinet resonance, featuring pre-installed wall mount brackets for easy home theater setup - perfect for either front main or home theater surround speakers. ?4" BASS DRIVERS?4 inch full range bass driver for well balanced natural sound and powerful deep bass. 6 ohm impedance. ?SILK DOME TWEETERS?High quality 0.75" (3/4 inch) silk dome tweeters provide accurate high frequency response and reproduces treble in every detail. ?SINGING WOOD ADVANTAGE?America's leading audio brand based in California, 24 months warranty and easy to reach after-sales customer support team always be with you when you are in need. We guarantee high quality parts and labor warranty service for two years with lifetime technical support.