Well im want to get some higher level dc woofers, I getting ready to sell my level 3s to someone this weekend. I was just wondering what size woofer i should get. Im thinking about getting the 4xl's. Currently i am running a pt cruiser in the lanes and i am pulling out 146.3db with the level 3s. I use a 5k warlord wired at 2 ohms for burping at 47htz. I have (2) 12's and a prefab memphis box. So what what size subs should i get.