that amp is not 1800 rms its 25x2 @4ohm stereo 75x2@2ohm stereo 150X2 at 1 ohm stereo and 300x2 at .5ohm stereo 150 at 4ohm bridged mono 300 at 2ohm bridged mono and 600 at 1 ohm bridged mono. where did you get 1800 rms??? adding all those numbers up?