I just bought two used 12's. They are 400w rms, 4 ohm dvc. If I wire them in a parallel that will give me 1 ohm right? So now I need am amp. I was thinking since they are used i would give them each 300w. What is a good website to buy off online, and who makes an amp that is stable to do 600w rms x 1 at 1 ohm?