I think I'm going to try the one I posted above...if that doesn't work, maybe Ill go this route next
AUDIO CONTROL LC6i 6-CHANNEL LINE OUTPUT CONVERTER W/ INTERNAL SUMMING | eBay
Hopefully before I get that far into blindly I can find some more assuring answers, fingers crossed.
BTW here's some pic's of the box I just finished putting together today. 3.0 cfs tuned to 34 htz. Soon to have A RE 15'' sub