I'm using all 4 channels, but the problem is the fact that the load on the amp is 2 ohm when the bridged setting is set for 4 ohm. either the amp or subs could be replaced to fix this, but the quick fix is to just get the same subs, different impedence, and throw them in. my biggest question though, you answered by saying that there would be no audible difference between the two. by selling my current ones, and buying these, I'll probably break even (or if I sell mine to an idiot I'll get a little cash
)until I can afford my infinity DVCs that I really want
