First off, I don't trust the people I know personally telling me what to get for an amp because I know they are not good at car audio.
So here's the deal, I have a set of Kenwood KFC-W3009. I have two of them in a box. I however have no clue what amp to get. Someone recommended the Kenwood KAC-8105D which is definitely in my price range (roughly 150-ish).
Would that work with them? The RMS of a single sub was 400 (800 max, whatever that means).