I have a kicker comp, 2 ultimate and one Orion for subs. I want to power the Orion and Kicker with a 700 watt Ultimate amp and the the 2 Ultimate subs with a 340 watt Jensen amp. That should sound half loud shouldn't it? I was just wondering what would be the best air space in cubic feet for these subs. I plan on making a sealed box since i wont have much room to fit 4 subs...If you could help me out that would be great!