I'm running the ST1000D. It's a greeat Amp. I replaced 2 Rockford Fosgate 500WATT AMPs with it. And I want with the ST1000D over the RF 1001. I'm still not sure which speaker setup I like better. 2 RF HE2's in Single sealed boxes. Or one 2Ohm DVC 12" runing 1 Ohm in a sealed 2ft box. I am thinking of making the 12" box ported.