Alpine subwoofer , 30 cm , 500 rms , 2 x 4 ohm
12" subwoofer with dual 4-ohm voice coils
Kevlar reinforced pulp cone with Santoprene™ rubber surround
cast aluminum frame with perimeter venting
frequency response: 25-500 Hz
power handling: 200-500 watts RMS (250 watts per coil)
peak power: 1,500 watts