Niles Surround Effect Home Speaker Set of 2 Black (CM7FX) ntegrated woofer/baffle design delivers greater low frequency response by employing a 7" woofer Glass fiber woofer Cone is extremely rigid to reduce breakup, lower distortion and provide enhanced bass response Dual 1" pivoting fluid-cooled Teteron dome tweeters offer Ultra-wide dispersion and silky-smooth high-frequency response Butyl rubber Cone surround Damps resonance and provides exceptional durability Bridge-mounted surround effects (Fx) tweeter Array directs the high-frequency sounds at opposing angles to create realistic surround sound effects