Are you using 12ga Speaker wire? And that amp is quite sweet indeed.

I have my Kenwood KAC-X4C and soon hopefully an X1R to be installed as well. I also got my Soundstream Power Plant to add to the trunk to better manage my wires and I am going out this weekend to hopefully get my MDF board to create my custom sub box for my newly arrived Power Akoustics Fubar 10's I have