Polk Audio FXI-A4 Timbre-matched High-Performance Surround LoudSpeaker - White

F/Xi Surround Loudspeakers employ a triangular cabinet design that aims Drivers and tweeters in opposing direcitons to produce a more realistically diffuse wave front and wide, lifelike imaging of surround-sound effects. A conveniently located bipole/dipole Switch offers placement flexibility as well as the highest performance surround effects. 1" Silk Dome Tweeter with neodymium magnets produces clear, detailed highs Bipole/Dipole Switch enables you to choose your sound radiation pattern according to your installation requirements creating the most realistic diffusion possible for your setup Acoustically inert 3/4" MDF cabinets Gold-plated 5-way binding posts for the most secure connections and the most versatile wiring applications Butyl rubber surrounds for high performance durability Acoustically inert stamped driver baskets Floating anti-diffraction grilles minimize grille diffraction for spacious, 3-dimensional imaging 5.25" Diameter (13.34cm) Polymer Composite Dynamic Balance with rubber surround Midrange 1" Diameter (2.54cm) Silk Polymer Composite Dome Tweeter 50Hz-27kHz Overall Frequency Response 60Hz Lower -3dB Limit 26kHz Upper -3dB Limit 8-Ohms Nominal Impedance 88dB Efficiency 5-way binding posts inputs Enclosure type: Vented with single port Dimensions: Height 12" x Width 11-3/8" x Depth 7-7/16" (30.48x28.89x18.89cm)