Video of K9 6.5” and 8” Subs:

Wiring for 1 DVC 4 Ohm SUBS:

Wiring for 2 DVC 4 Ohm SUBS:

Features:

• Rockville W8K9D4 K9 Series 8" Dual4-Ohm Car Subwoofer
• Peak Power Handling: 2000 Watts
• Program Power Handling: 1000 Watts
• CEA Rated RMS Power Handling: 500 Watts
• 2.5" 4-Layer ASV Voice Coils Wound with OFC Wire Made in USA
• This voice coil is stable up to 200 degrees celcius! The voice coil windings are made in the USA!
• Double Stacked 122 Oz High Quality Magnet
• Cast Aluminum Basket With Black Sanded Finish Makes This Sub Very Efficient And Lighter Weight
• Two Chrome-Plated Binding Post Terminals
• Black Non-Pressed Paper Cone With Beautiful Finish
• Our cones are ultra-stiff. They are thicker and stronger than other subs on the market making our subs able to handle more power.
• Thick Foam Surround Provides Incredible Sound Quality With Minimal Distortion
• Black Stitching Cone Reinforcement Ensures Long Life
• New Ultra-stiff PolyPropylene (PP) Dustcap
• Impedance: Dual 4-Ohm Voice Coils
• Vented Hole on T-yoke Enhances Heat Dissipation
• Special Custom Rubber Boot Magnet Covers Make the Woofer Look Nice and Protects the Magnet
• Custom Rockville Mounting Gasket Looks Beautiful and Makes it Easy To Mount the Subwoofer Air-Tight
• High BL Magnetic Motor Gap
• We use high grade glue that handles extremely high temperatures which allows our woofer to handle even more power than they are rated
• Poly cotton spider with very good elasticity
• Cutout Diameter: 7.32” inches
• Mounting Depth: 5.91” inches
• Frequency Response: 48 hz- 800hz
• 10mm T-Yoke + 10mm Washer
• Sensitivity: 81.2dB
• Sealed Enclosure Volume:0.28-0.42 Cubic Feet
• Vented/Ported Enclosure Volume: 0.64-0.92 Cubic Feet
• Weight: 18.74 Lbs.
• Shipping Weight: 20.95 Lbs.
• Shipping Box Dimensions:11.42"x 11.42"x11.81" Inches

Detailed Info:

• Body: Non-Pressed Paper
• Gap Plate Inside Diameter: 67.4mm (2.65 inches)
• Gap Plate Outside Diameter: 145mm (5.71 inches)
• Gap Plate Thickness: 10mm (0.39 inch)
• Yoke Outside Diameter: 145mm (5.71 inches)
• Yoke Thickness: 10mm (.0.39 inches)
• Yoke Pole Diameter:60.1mm (2.37 inches)

TS Parameters: