alpine mrp m450 amp specs--
Mono subwoofer Class-D car amplifier
Frequency Response: 20Hz - 200Hz (+3/-3dB)
250 watts RMS x 1 at 4 ohms (400 watts RMS x 1 at 2 ohms)
Variable low-pass filter (50-200 Hz, 24 dB/octave)
Tuned Bass EQ (0-12 dB bass boost at 50 Hz)
Subsonic filter (24 dB at 15 Hz)
MOSFET power supply
CEA-2006 compliant
STAR Topology (minimizes internal noise and prevents ground interference)
Speaker- and preamp-level inputs
Gold-plated screw terminals
Fuse rating: 20A x 2
8-gauge power and ground leads recommended — wiring and hardware not included with amplifier
9-3/16"W x 2-3/8"H x 9-1/2"D
Input Impedance: 10k Ohm

kicker 12" cvr SINGLE sub specs- i will have two of them