Ok, I'm new to car audio and everything. I'm getting 2 Kicker 12's (300W) and a Kicker 350W Amp. The specifications on the amp say "Handles up to 90W RMS continuous power @ 2 ohms or 60W RMS @ 4 ohms" I have no clue what it means and I need to know if this is a good match so they subs won't blow. And would these hit pretty hard?