Rockville W12K9D4 V3 12 K9 V3 4000w Peak/1000w RMS Car Subwoofer DVC 4-Ohm Sub

Features of W12K9D4:
Rockville W12K9D4 K9 Series 12 Dual 4-Ohm Car Subwoofer
Peak Power Handling: 4000 Watts
Program Power Handling: 2000 Watts
CEA Rated RMS Power Handling: 1000 Watts
3 4-Layer Black Aluminum Voice Coils 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 the highest grade black 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: 11.13 inches
Mounting Depth: 6.85 inches
Frequency Response: 33 Hz – 1.5K kHz
10mm T-Yoke + 10mm Washer
Sensitivity: 83dB
Sealed Enclosure Volume: 0.9 ?C 1.47 Cubic Feet
Vented/Ported Enclosure Volume: 1.8 ?C 2.75 Cubic Feet
XMAX is 28MM
Weight: 28.67 Lbs.
Shipping Weight: 33 Lbs.
Shipping Box Dimensions: 14.57 x 14.57 x 10.83 Inches
XMAX: 28MM
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)

Video of W12K9D4:

Rockville W12K9D4 K9 Series 12 Dual 4-Ohm Car Subwoofer
Peak Power Handling: 4000 Watts
Program Power Handling: 2000 Watts
CEA Rated RMS Power Handling: 1000 Watts
3 4-Layer Black Aluminum Voice Coils Wound with OFC Wire Made in USA
The OFC Wire we use is made in USA. This voice coil we use can hold 240??.andthis voice coil is the best one that in the same power handle level. This voicecoil can let the subwoofer high quality and work so long time. The temperatureresistance is very strong.Double Stacked 190 Oz High Quality Magnet
Cast Aluminum Basket With Black Sanded Finish Makes This Sub Very Efficient AndLighter Weight
Two Chrome-Plated Binding Post Terminals (These are the best terminals on themarket and they accept any gauge wire and easy to connect. won’t be oxidation)
Black Non-Pressed Paper Cone With Beautiful Finish
Our cones are ultra-stiff. They are thicker and stronger than other subs on themarket 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) DustcapImpedance: 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 Protectsthe Magnet
Custom Rockville Mounting Gasket Looks Beautiful and Makes it Easy To Mount theSubwoofer Air-Tight
High BL Magnetic Motor Gap
We use the highest grade black glue that handles extremely high temperatureswhich allows our woofer to handle even more power than they are rated
Nomex Spider provides tear resistance. strength and long-term reliability overregular cotton and poly cotton spiders
Cutout Diameter: 11.13? inches
Mounting Depth: 6.85? inches
Frequency Response: 33 Hz – 1.5K kHz
10mm T-Yoke + 10mm Washer
Sensitivity: 83dB
Sealed Enclosure Volume: 0.8 – 1.25 Cubic Feet
Vented/Ported Enclosure Volume: 1.75 – 3.0 Cubic Feet
Weight: 28.67 Lbs.
Shipping Weight: 33 Lbs.
Shipping Box Dimensions: 14.57 x 14.57 x 10.83 Inches
TS Parameters:

Fms: 35.7 Hz
Res: 89.4 Ohm
Re: 7.6 Ohm
Qms: 4.60
Qes: 0.61
Qts: 0.54
Rms: 11.8kg/s
Cms: 0.08mm/N
Mms: 242.4 gr
Nref: 0.22%
Bl: 26.1N/A
SPL: 85.3dB
VAS: 30.0 L
Rp: 53.7 Ohm
LP: 48.8mH
CP: 499.5uF
Le: 3.28mH
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)