Package Includes: (2) Rockville K5 W15K5S2 15" 2000w 2 Ohm Car Audio Subwoofer Sub 500w RMS CEA Rated! Video of K5 SERIES: Features: Rockville W15K5S2 K5 Series 15" 2-Ohm Car Subwoofer Peak Power Handling: 2000 Watts Program Power Handling: 1000 Watts CEA Rated RMS Power Handling: 500 Watts 2.5" 4-Layer Black Aluminum Voice Coils Wound with OFC (100% Copper) Wire The wire we use to wind the voice coil is imported from Japan which is way better quality than the standard China wire 60 Oz High Quality Magnet Cast Iron Basket With Black Sanded Finish Fiber Reinforced Ultra Stiff Black Non-Pressed Paper Cone – This cone is very efficient which makes the speaker sound louder even without requiring a lot of power to push it Thick Foam Surround Provides Incredible Sound Quality With Minimal Distortion Blue Stitching Cone Reinforcement Ensures Long Life Paper Dust cap is light weight and efficient helping the sub to play louder even if your amp is not so powerful Chrome-Plated Binding Post Terminals - These are the best terminals on the market and they accept any gauge wire Impedance: Single 2-Ohm Voice Coils Vented Hole on T-yoke Enhances Heat Dissipation Rubber Boot Magnet Covers Make the Woofer Look Nice and Protects the Magnet Mounting Gasket with Rockville branding looks great and Makes it Easy To Mount the Subwoofer Air-Tight High BL Magnetic Motor Gap We use the highest grade black glue that handles extremely high temperatures which allows our woofer to handle even more power than they are rated Cutout Diameter: 13.85 inches Mounting Depth: 5.98 inches Frequency Response: 28.6 Hz - 1.0K kHz 6mm T-Yoke + 8 mm Washer Sensitivity: 90.8dB Sealed Enclosure Volume:1.5 – 2.5 Cubic Feet Vented/Ported Enclosure Volume: 2.3 – 3.5 Cubic Feet Weight: 13.4 Lbs. Shipping Weight: 15.4 Lbs. Shipping Box Dimensions: 16.53x 16.53 x 9.76 Inches Detailed Info: Body: Non-Pressed Paper Gap Plate Inside Diameter: 85mm (3.34 inches) Gap Plate Outside Diameter: 170mm (6.69 inches) Gap Plate Thickness: 25mm (0.98 inches) Yoke Outside Diameter: 156mm (6.14 inches) Yoke Thickness: 6mm (0.23 inches) Yoke Pole Diameter: 60mm (2.4 inches) T/S Parameters (Tested on a Klippel): Electrical Parameters Re 1.96 Ohm electrical voice coil resistance at DC Le 0.818 mH frequency independent part of voice coil inductance L2 1.841 mH para-inductance of voice coil R2 15.38 Ohm electrical resistance due to eddy current losses Cmes 1155.17 µF electrical capacitance representing moving mass Lces 26.84 mH electrical inductance representing driver compliance Res 25.84 Ohm resistance due to mechanical losses fs 28.6 Hz driver resonance frequency Mechanical Parameters (using laser) Mms 216.253 g mechanical mass of driver diaphragm assembly including air load and voice coil Mmd (Sd) 190.481 g mechanical mass of voice coil and diaphragm without air load Rms 7.245 kg/s mechanical resistance of total-driver losses Cms 0.143 mm/N