Planet Audio BB570 5-Inch x 7-Inch 2-Way Silver Glass-Fiber Woofer Cone Speaker System Power Handling (Peak) 120W , Power Handling (Continuous) 60W , Frequency Response 65Hz-20Khz , Efficiency (1 Watt/1 Meter) 90 Db , Impedance 4 Ohm Mid Bass Woofer: 5-Inch X 7-Inch , Soft Dome Tweeter: 1-Inch, Soft Dome Micro Tweeter  , Woofer Magnet Structure 15 Oz , Mounting Depth 2-9/16-Inch 5-Inch X 7-Inch 2-Way Speaker System Also Fits 6-Inch X 8-Inch Applications Silver Glass-Fiber Woofer Cone Patented Crs (Cloth Reinforced Patented Crs (Cloth Reinforced Santoprene) Surround Open Design-Inch Stamped Basket Silk Soft Dome Tweeters With Neodymium Magnets  Bi-Amp Capability  Custom Tooled Grilles Each Pair Of Big Bang Speaker Systems Includes A Pair Of Custom Designed Outboard Crossovers