Getting ready for the summer, so Im building me a new box. Always used a sealed box. Now do I have to use the center divider in the box or can I leave out. I'll be using 2 15's dont know what kind yet still looking. And how do you run two amps together or can that be done. Last ? has anybody ever heard of an amp called Massive is say 150 on it. It's about 24in long and 10in wide and weighs about 10-20 pounds and all chrome.