the amp is a kac-9104d class d mono 1800 watts max, 500watts rms x 1 @ 4 ohms and 900 watts x 1 at 2 ohms. he has it hooked up to 2 12's kfc-w3011 kenwoods 1200 watts 4 ohm coils. he needs help with the amp settings any help would help
for starters, try: 60dB crossover, low pass 18dB/octave Q factor no bass boost or loudness/EQ function gain, or input sensitivity @ about 1/4th of the way up, turning the knob or screw setting clockwise to increase "gain" or sensitivity.
that should be a good starting point. tweak it from there.