Planet Audio BB650 6.5-Inch 2-Way Silver Glass-Fiber Woofer Cone Speaker System Power Handling (Peak) 160W , Power Handling (Continuous) 80W , Frequency Response 60Hz-20Khz , Efficiency (1 Watt/1 Meter) 91 Db , Impedance 4 Ohm Mid Bass Woofer: 6-1/2-Inch , Soft Dome Tweeter: 1-Inch , Soft Dome Micro Tweeter:  , Woofer Magnet Structure 20 Oz , Mounting Depth 2/3/2004 6.5-Inch 2-Way Speaker System Silver Glass-Fiber Woofer Cone Patented Crs (Cloth Reinforced Santoprene) Surround Open Design-Inch Stamped Basket Black Anodized Aluminum Voice Coil Former 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