I want to convert an old Ampeg 6x10 bass cab to a 4x10 and 1x15 speaker cab. 10s in the corners, 15 in the middle, with a new baffle. I have 4 working 10s at 8ohms, and I will pick up the 15 when I can. I would like it to have only one jack like it already has, but am open to adding another if you guys tell me I have to. I normally play an SVT4 through it. Can anybody help me with this? Thanks!