6-1/2" extended throw polypropylene-mica cone woofer with phase plug, and durable Santoprene surround 1" fabric dome tweeter with ferrofluid damping/cooling for increased power handling and a smoother response  12 dB/octave crossover network with premium parts  Knockout plug for installing infrared receiver  Acoustically transparent, fine mesh grill with paint shield  Woven dust screen to protect woofer from in-wall debris  Six-point "dog-leg" mounting system  Optional NCK-3M New Construction Kit  Parasound 5 year parts, 5 years labor warranty