I am thinking of trying out an OB setup but aren't every clear of how it all works. Basically all I know is that depends of the baffle shape ( I, H, M or U) it effects the response. How do I calculate the sizes of each baffle. I also see some OB designs where is just basically a baffle holding the speaker (I shape), but wouldn't that create phasing problem and cancelations? I'm currently runing a 2-way DIY set using the 7" scanspeak REV and LCY110 ribbon. I eventually want to add a subwoofer to that but want to try OB everything. Also what size, sub and how many do you guys recommend? It'll probably be crossed around around 150-200 and down. I've audition some dipole setup at CES and really like how responsive and natural it sounded. One more thing, what about if I just go dipole with the 2-way and maybe sealed with the sub? The only concern I have with that is the effeciency between the two. Any information will be greatly appreciated. I am still a noob so fill me up with everything you got! thanks!