It is a cheap amp and will only make its 4 ohm rated power. The 2 ohm number that Kenwood gives you is a pipe dream at best! So if all you need is 300 watts RMS @ 4 ohms or about 350 watts RMS @ 2 ohms, you are in good shape. If you think that amp will produce 500 watts of power with its 40 amp fuse, well, you have been duped!