subs and amp help please

Insanity Amp Specs

Class D, Complementary MOSFET Mono Bass Amplifier
400 Watts RMS at 4 Ohm / 600Watts RMS at 2 Ohm
1200 Watts Max at 2 Ohm / 90db signal to noise ratio
.20% THD / 1 Ohm Stable
10 Hz - 160Hz Frequency Response
L & R Variable gain RCA Inputs
12/24 per Octave low Pass Switchable Crossover
250mv - 5.5v Input Sensitivity
RCA Outputs Pass Through Unity Gain
0 - 18db at 45Hz Variable Bass Boost
Infrasonic Filter Variable
Tri-Model Speaker Connection Stable / Variable Input Level Controls
High Speed Digital Circuitry / Class A/B Delivers Ultimate Efficiency
Three way Protection-Thermal, Short Circuit and Overload
Soft Delayed Power On/Cooling fan
Dimensions: 13.4" x 9.1" x 2.1"

Those are the only specs i have. If it works like shit . im returning it