Hey everyone, i need your experteez!! Ive got 3 pioneer 1201c 12inch 1000w subs and they came with ther own indevidual boxes but they hardly fit in the boot!! I want to make my own box but firstly i need to know if each sub has to have its own compartment in the bos or can they all use the same air. If thats makes sense!! ta very muchly!!