Ok I'm not quite sure on how Ohms fit in with power. If I was getting one --300 watt rms 12" subwoofer-- with "dual 2 ohms".. what kind of amp would I get. What's the difference between "Dual 2 Ohms" and 4 ohms? would I get a -150 watt amp w/4 Ohms- and bridge the power to get the 300 in 2 ohms? or -300 watt RMS w/4 ohms

'dual 2 ohms' means that the woofer has 2 2ohm voice coils. You can wire the voice coils in series and get a 4ohm load, or wire them in parallel and get a 1ohm load. Or you can run each coil off of a seperate amplifier channel. This is done purely to allow better wiring flexibility. The 300 watt rating on the subwoofer really depends on the woofer in question. Sometimes the rating is overinflated, and the woofer would be destroyed with that much power for extended times. Other times it could be underrated. It would be more helpfull if you specified the woofer in question. As to what amplifier to get, it would be much more helpfull to know what the woofer is.

what i was at first thinking of getting: Alpine 12" 1000-Watt Subwoofer (SWR1221D) - 300 watt RMS Dual 2 Ohms http://www.circuitcity.com/ccd/productDetail.do?oid=55680 MTX Mono-Channel Amplifier (MXA6001) - 300 watt RMS at 4 Ohms http://www.circuitcity.com/ssm/MTX-Mono-Channel-Amplifier--MXA6001-/sem/rpsm/oid/90872/rpem/ccd/productDetail.do I saw the Dual 2 Ohms and second guessed myself so that's why I came here.