I have 2 12" Alpine SWS-1242D type S subwoofers that RMS 300 watts each. I have a JBL BP 600.1 amp running them 300 watts each at 1 ohm. I have them in 2 separate sealed enclosures. I was wondering if they would sound better if I got a different box. Should I get a ported, or bandpass, or 1 sealed box for both of them, or wut? Which would sound best? What is the difference between all of them?