Features:

Rockville W12K6D4 V2 K6 Series 12" Dual 4-Ohm Car Subwoofer
Peak Power Handling: 2400 Watts
Program Power Handling: 1200 Watts   
CEA Rated RMS Power Handling: 600 Watts 
2.5" 4-Layer Black Aluminum Voice Coils Wound with OFC (100% Copper) Wire
The wire we use is made in the USA! It is one of the most important components to make the sub high quality and last longer
Double Stacked 100 Oz High Quality Magnet
Cast Aluminum Basket With Black Sanded Finish Makes This Sub Very Efficient
Fiber Reinforced Ultra Stiff Black Non-Pressed Paper Cone
Thick Foam Surround Provides Incredible Sound Quality With Minimal Distortion
Red Stitching Cone Reinforcement Ensures Long Life
Polypropylene (PP) Dustcap
Two Chrome-Plated Binding Post Terminals - These are the best terminals on the market and they accept any gauge wire
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
Cutout Diameter: 11.125” inches
Mounting Depth: 5.75” inches
Frequency Response: 27 Hz - 1.5K kHz
8mm T-Yoke + 8mm Washer
Sensitivity: 85dB
Sealed Enclosure Volume: 1.0 - 1.5 Cubic Feet
Vented/Ported Enclosure Volume: 1.65 - 2.5 Cubic Feet
Weight: 17.64 Lbs.
Shipping Weight: 22.05 Lbs.
Shipping Box Dimensions: 15.75" x 15.75" x 13.6" Inches
TS Parameters:

Fms: 35.3 Hz
Res: 80.2 Ohm
Re: 7.6 Ohm
Qms: 5.05
Qes: 0.65
Qts: 0.58
Rms: 9.5kg/s
Cms: 0.11mm/N
Mms: 235.0 gr
Nref: 0.18%
Bl: 23.2N/A
SPL: 85dB
VAS: 40.2L
Rp: 55.6 Ohm
LP: 60.5mH
CP: 536.7uF
Le: 3.88mH