I got my 2 ab tnt 10s in a temporary prefab until I figure out all my options for the other 2 driver's I want to buy. the boxes will be built back to back but not sharing the same airspace. also will be run off of separate amps. don't think my cabin is big enough to go for different size driver's but what about a different brand? I was thinking 2 hds3 10s along with the tnts but would cancellation still be a problem? do I have to get all 4 of the same driver's?