Features & Specifications:
Sundown Audio LCS-12 D4 Car Subwoofer
Power Handling:
RMS: 300 Watts 
Xmax = 14mm linear by 70% BL
X-Mech = 27.5mm One-way Maximum
Dual spade connectors for easier series/parallel wiring
Glossy Paper Cone
Durable Foam Surround
Double Stacked Motor
Vented Magnetic Gap
Fully Tied-On Leads
Stamped Steel Frame
Linear spider with cupped edges to increase x-mech limits of triple joint to woofer top-plate
Black Aluminum 2” voice coil former for superior heat dissipation
Box Recommendations:

Sealed: 1.0-1.25 ft^3
Ported: 1.75 ft^3
Displacement: 0.12 ft^3
Depth: 6 7/8”
Outside Diameter: 12 1/4"
Cut-Out: 11 1/8"
Recommended Tuning: 32hz
Recommended Port Area: 28 in^2