im having a problem hooking these up. amp is mtx thunder 801d 800rms @ 2 ohm sub is kicker L7 12" 750rms @ dual 2 ohm ( = 1 ohm?) now, the amp said it has a 2 ohm minimum and the sub can only be hooked up as either 1 ohm or 4 ohm. so does that mean i can only hook it up to the amp as 4 ohm and get 400rms instead of the 750rms from 1 ohm.?