All about your K9 Series Subwoofers:

Wiring for 1 DVC 4 Ohm SUBS:

Wiring for 2 DVC 4 Ohm SUBS:

Features of W15K9D4:

• Rockville W15K9D4 K9 Series 15" Dual 4-Ohm Car Subwoofer
• Peak Power Handling: 5000 Watts
• Program Power Handling: 2500 Watts   
• CEA Rated RMS Power Handling: 1250 Watts 
• 3" 4-Layer Black Aluminum Former Wound with OFC Wire Made in USA
• This voice coil is stable up to 240 degrees celcius! The voice coil windings are made in the USA! 
• Double Stacked 190 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
• Red 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
• Nomex Spider provides tear resistance, strength and long-term reliability over regular cotton and poly cotton spiders
• Cutout Diameter: 14.09” inches
• Mounting Depth: 8.23” inches
• Frequency Response: 32 Hz - 1.5K kHz
• 10mm T-Yoke + 10mm Washer
• Sensitivity: 87.9dB
• Sealed Enclosure Volume: 1.7 – 2.9 Cubic Feet
• Vented/Ported Enclosure Volume: 2.7 – 3.85 Cubic Feet
• XMAX is 30mm
• Weight: 34.17 Lbs.
• Shipping Weight: 38.58 Lbs.
• Shipping Box Dimensions: 17.72" x 17.72" x 12.4" Inches
• XMAX: 30 MM

Detailed Info:

• Body: Non-Pressed Paper
• Gap Plate Inside Diameter: 95mm (3.74 inches)
• Gap Plate Outside Diameter: 190mm (7.5 inches)
• Gap Plate Thickness: 25mm (1 inch)
• Yoke Outside Diameter: 180mm (7.1 inches)
• Yoke Thickness: 10mm (0.4 inches)
• Yoke Pole Diameter: 75mm (3 inches)

TS Parameters: