condition: like new make / manufacturer: polk model name / number: audio more ads by this user Features & specs Dynamic Balance: Dynamic Balance drivers are used for wide, smooth response and low distortion. Blue Composite Woofers: The speaker uses dual blue composite Dynamic Balance woofers for clean midrange and deep, accurate bass. For a smoother response and improved durability, the woofers use rubber surrounds. Tri-Laminate Tweeters: The improved Dynamic Balance Tri-Laminate tweeter has vapor-deposited micro-layers of stainless steel and aluminum for clear, detailed highs. Bass Reflex: There is a single port tube opening on the rear of the speaker for increased and extended bass response. 5-Way Binding Posts: The gold plated 5-way binding posts will accept bare wire, pin connectors, spade connectors, banana plugs, and dual banana plugs. Enclosure Bass Reflex Color Black Tweeter Dome Midrange size (inches) N/A Woofer size (inches) 5-1/4 Connector Type 5-way post Power Range 10-180 Sensitivity 90 dB Impedance (Ohms) 8 Frequency Response 55-25k Hz Height (inches) 0 Width (inches) 0 Depth (inches) 0 Weight 0 lbs Recommended Center Channel Mode: Polk recommends using this speaker in the normal (small) channel mode when used with either Dolby Pro Logic or Dolby Digital/DTS . The crossover is a 2nd order low pass filter cascaded at 2kHz. and 900 Hz, and a 2nd order high pass filter at 2kHz. Frequency Response: The overall frequency response is 52Hz-26kHz, -3dB frequency response is 55-25kHz.