Hi im new to the forum and was wondering if there is anyone that can help me, i have always done db drag and bassrace, but now i fancy a groundpounder and was looking towards the idea of a 18, my main target is to play flat and be able to bassrace in 139.9 i dont want a wall just a box so i can take it out if i need to, so my questions are, what box design would be best for a single 18, will i be better off with 1.5k or 3k?(thinking with 1.5k i will be able to play for longer), what 18inch sub would be best for what i am trying to achieve. Any help will be appreciated.