Hey guys starting to build a new system....Running a orion 2500d right now and i need something that's gonna hit them lows like no other. Cannot run ported so I was thinking either 3 12's sealed or 2 15's sealed, cant go with 18's due to space issues...Can you guys recommend me some subs that will sound great in a sealed enclosure and get real low with the amount of power i have right now???? thanks!