It wouldn't appear as though the Rogue's are ideal for sub 3 Ohm impedances:
http://www.stereophile.com/content/rogue-audio-m-180-monoblock-power-amplifier-measurements#LVjCMXjMd2M7Rf56.97
http://www.stereophile.com/content/rogue-audio-m-180-monoblock-power-amplifier-measurements#LVjCMXjMd2M7Rf56.97

