DESC: 6' x 9' Yellow Injection-Molded Polymica Cone Woofer Specially Treated Rubber Edge Suspension Resists Moisture and Temperature Extremes 1.5 Ferro Fluid Enhanced Aluminum Voice Coil Basket Anodized in Matte Black 100 oz. Magnet Structure 2.75 Pole Mounted Aluminum Film Midrange 1.75 High Frequency Aluminum Film Tweeter 400 Watts Rated Power SPL: 93dB Frequency Response: 50Hz-20k Hz 4 Ohm Impedance Surface or Deck Mount Capability Mounting Depth: 3.75