Get a 2 ohm stable mono amp. Assuming your speaking about the dual 4 ohm coil, run the speaker in parallel. I wouldn't do the eD amp only because its not 2 ohm stable when bridged, which is what your going to need to do to run this speaker. Id shoot for 550-600 watts RMS into 2 ohms. Headroom is always nice. Heres a diagram on how to wire the sub to the amp to yield the correct load http://www.rockfordfosgate.com/rftec...8&image=Submit
The RF diagrams are a little bit confusing but you should be able to get the picture. On the sub, + to + and - to -. Then out to the amp, make sure the polarity is correct.