Alpine SWR-12D4

12″ subwoofer with dual 2-ohm voice coils
Kevlar reinforced pulp cone with HAMRS Santoprene rubber surround
frequency response: 24-200 Hz
power handling: 300-1,000 watts RMS (500 watts per coil)
peak power: 3,000 watts
sensitivity: 84.7 dB
top-mount depth: 6-3/8″
sealed box volume: 0.75-1.00 cu. ft.
ported box volume: 1.25-1.50 cu. ft.
warranty: 1 year