Yeah, that amp aint puttin out 1800w rms. Number one, your car would probably shut off, number two, two Kicker Comps aren't going to handle 1800w rms in a ported box for much more than a week. There's alot of things you could be doing wrong, but it's hard to say without seeing it. I'd start with adequate power and ground wiring, gains set moderately, and crossovers set below 80hz. This is all assuming that amp is actually 2ohms stable.