Looking for a sub/subs that absolutely crushes the lows while getting loud doing it. The max airspace I have is 4 cubes and I have about 1200 watts on tap but hopefully will be upgrading to 2k in the future. Will be in a trunk. Right now I have a single 12 vvx at 30 hz and its leaving me wanting more..have that to trade and a 10 inch alpine type x if anyone is interested. Budget is around $250-$300 but for the right deal I may be able to swing a bit more.