Rockville W8K5S4 4-Pack + REC120 Quad 8 Enclosure Bundle

Package Includes: (4) Rockville K5 W8K5S4 8" 800w 4 Ohm Car Audio Subwoofer Sub 200w RMS CEA Rated! (1) Rockville REC120 Quad 8" Ported Bedlined Sub Box For 2007- CURRENT GM Crew Cab (2) Dual Sub Box Enclosure Installation Kit: Speaker Wire, Screws, Spade Terminals Video of K5 SERIES: Features: Rockville W8K5S4 K5 Series 8" 4-Ohm Car Subwoofer Peak Power Handling: 800 Watts Program Power Handling: 400 Watts CEA Rated RMS Power Handling: 200 Watts 1.5" 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 30 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 4-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: 7.16 inches Mounting Depth: 3.54 inches Frequency Response: 37 Hz - 1.3K kHz 5mm T-Yoke + 5mm Washer Sensitivity: 85.7dB Sealed Enclosure Volume: 0.35 – 0.85 Cubic Feet Vented/Ported Enclosure Volume: 0.6 – 1.2 Cubic Feet Weight: 5.2 Lbs. Shipping Weight: 6.5 Lbs. Shipping Box Dimensions: 10.25x 10.25 x 8.1 Inches Detailed Info: Body: Non-Pressed Paper Gap Plate Inside Diameter: 60mm (2.36 inches) Gap Plate Outside Diameter: 120mm (4.72 inches) Gap Plate Thickness: 25mm (0.98 inches) Yoke Outside Diameter: 114mm (4.48 inches) Yoke Thickness: 5mm (0.20 inches) Yoke Pole Diameter: 38mm (1.5 inches) T/S Parameters (Tested on a Klippel): Electrical Parameters       Re 3.43 Ohm electrical voice coil resistance at DC Le 0.899 mH frequency independent part of voice coil inductance L2 1.32 mH para-inductance of voice coil R2 13.71 Ohm electrical resistance due to eddy current losses Cmes 610.26 μF electrical capacitance representing moving mass Lces 20.57 mH electrical inductance representing driver compliance Res 34.13 Ohm resistance due to mechanical losses fs 44.9 Hz driver resonance frequency         Mechanical Parameters       (using laser)       Mms 54.697 g mechanical mass of driver diaphragm assembly including air load and voice coil Mmd (Sd) 51.475 g mechanical mass of voice coil and diaphragm without air load  Rms 2.626 kg/s mechanical resistance of  total-driver losses Cms 0.229 mm/N mechanical compliance of driver suspension