ok, read the original post and I have a few questions. If it was answered already just say so and I'll do soem more reading.
1. What actual model subs and amp? I know its a kenwood amp and L7's, but it would help to have the actual model number like S10l7d4 or whatever.
2. What is the final ohm load that the amp is seeing?
3. How it it wired up and with what size wire?
4. How were your gains set?
5. Have you tested your battery and alt to make sure they were still good?
We can move on from here and see if we can get this figured out.