Planet Audio BB690 6-Inch x 9-Inch 3-Way Silver Glass-Fiber Woofer Cone Speaker System Power Handling (Peak) 200W , Power Handling (Continuous) 100W , Frequency Response 45Hz-20Khz , Efficiency (1 Watt/1 Meter) 93 Db , Impedance 4 Ohm , Mid Bass Woofer 6" X 9-Inch , Soft Dome Tweter Diameter 1-Inch , Soft Dome Micro Tweeter: 3/4-Inch Woofer Magnet Structure 30 Oz , Mounting Depth 3-9/16-Inch 6-Inch X 9-Inch 3-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