your amp will give you 400 at 4 ohm.....
mono subwoofer amplifier
400 watts RMS x 1 at 4 ohms (700 watts RMS x 1 at 2 ohms)
1,000 watts RMS at 1 ohm
Class D amplifier design
differential-balanced inputs
MOSFET switching power supply
frequency response: 10 Hz - 160 Hz
variable low-pass filter (40-300 Hz, 12 dB/octave)
variable bass boost (0-12 dB at 45 Hz)
wired remote level control included
preamp inputs and outputs
speaker-level inputs
fuse rating: 35A x 3
4AWG Amp installation kit recommended
14-5/8"W x 2-3/16"H x 9-5/8"D
warranty: 1 year