ok i got two 18" Fi Q's in a 15cuft box in my ext cab. tuned at 30hertz. i am running them off one Alpine MRP-2000 at the moment (which is 2000 @ 2 ohm), but I wired the (dual 1) subs in series-parallel for a 1 ohm load, which is 'unhealthy' for my amp. So whats the best one amp set-up for my system? or should i get another alpine and wire them at 2 ohms a piece to separate amps? really wanting a single amp setup though (and may possible upgrade to BTL's later, so i need some extra POWAA down the road!)