im changing my wall over from 8 tens sealed to 2 15s ported and then in a litte while it will be 4 15s. so im still undecided if i should go slot port on the two 15 wall and port it on the passanger side or use some 8 inch quickcrete tubes. this would be hard tho cause id have to use multiple and theyd have to be pretty long. anyway how should i do the box for the 2 15s? go for one chamber common port or do two chambers port seperated?