Ok... RMS power means root mean square, or in plain english, the amount of constant power your speakers can handle for normal playing... sometimes in music there are louder bursts, and most of the time the max power ratings are meant to be the amount of power a sub can handle for 2 seconds or less. So getting 2 mtx amps pushing 210 watts RMS at four ohms would be kind of a waste.... You could just get one, and wire your subs in parallell to the amp, resulting in a 2 ohm load. at a 2 ohm load, that amp should be pusing about 400 watts, which split into the 2 subs you would get 200 watts per sub. For the Type R alpines, assuming that they are single 4 ohm subs and NOT Dual Voice coil subs, I would put a bigger mono amp on the two than that.... don't go out and get 2 mono amps. You would be better off getting 2 two-channel amps, becuase a 2 channel amp would do better into a 4 ohm load. OR get a big frikkin 4 channel amp, bridge the channels down from four to two channels, and run your subs off that.... Basically, I think the best bang for your buck solution is going to be a mono amp that runs 800 watts into 2 ohms... if you go to a circuit city and check out the MTX MXA 8001, that would pound those subs. But, get at least a 1 farad capacitor to buffer the draw off your battery. If your headlights dim everytime your subs hit, it looks stupid.... but think of what happens to your spark in the combustion chamber, too......
