I am in the middle of my IB install in my attic. I have one Dayton DVC 12" (so far) and a PE 250w amp. I have read that when running two drivers, only one voice coil for each should be used, and wired in parallel. What do you do when you have only one driver? I assume I want to it at 4ohm. What are the benefits of one/both? I also want find out how I can add a couple of extra hours in a day.