• Pair of timbre-matched surround speakers to fit any Polk Audio home theater or multi-channel music system



• Equipped with a 5.25-inch dynamic balance driver with polymer/mineral composite cone



• Features a neodynium magnet, low viscosity ferro-fluid cooling, and a heat sink on the back of the magnet



• Equipped with two 1-inch silk/polymer composite dome tweeters



• All MDF construction and extensive asymmetric cabinet bracing ensure resonance-free enclosures

Add the Polk FXi A4 surround speakers to your home theater system and enjoy dramatic rear-channel sound effects with your favorite moviesThese cleverly designed speakers feature two tweeters aimed 45-degree from each other, for an ideal mix of direct and indirect soundA dipole/bipole switch lets you position the FXi A4s on the rear or side walls of your home theater room ¿ you'll get great results either wayIf you place them behind your listening position, set them to bipole mode for distinct, directional soundOr set them to dipole mode for side placement, and they'll create a more diffuse soundfield for convincing wraparound effectsPolk carefully designed the drivers using laser testing to help identify and eliminate resonance pointsThe acoustically inert MDF cabinets fight internal vibrations that can compromise performanceIt all adds up to enveloping surround sound that fully immerses you in the movie action.