Threadjack!! Any chance you still have the ST1000D?I use to have 2 Memphis PR 12's on the older Memphis ST1000D and they had no problem taking that amp at 1ohm. But if you are really that concerned about them taking the power then just get the Single 4ohm coil's and wire it to 2ohms. Getting the PR1000 or any other good 1000D now will set you up to be able to upgrade to a bigger woofer in the future and use the full potential of the amp.