Alphasonik PSW310X 10" Shallow Mount Sub Woofer 800 Watts Dual 4-Ohm Copper Black Anodized Voice Coils with Aluminum Cone Car / Truck High Power Low Profile Flat Slim Thin Bass Speaker Subwoofer 10" Dual 4 ohm Alpha 300 Series Shallow Mount Subwoofer | Power Handling: RMS: 400 watts Max: 800 watts Spun aluminum inverted cone | High strength glass fiber enhanced surround | Low profile shallow mount design | Platinum plated 8-gauge Lug-Lock terminals | Powder coated stamped steel basket Dual 2" 4-Ohm voice coils | Magnet Type: Strontium | Magnet Size: 46 oz. | Frequency Response: 28-500 Hz | Sensitivity: 89.7 dB Impedance: Dual4 Ohm | Mounting Depth: 3.2" | Mounting Through Hole: 9-5/8" | Diameter: 10-7/16" Minimum Sealed Enclosure Volume: 0.75 Cut | Maximum Sealed Enclosure Volume: 1.0Cut | Ported Enclosure Volume: 1.75Cut