yea those are the ones i saw earlier but i couldnt find the right hz. Unless 30 hz is all i need. I dont know if there is a big difference between 30 and 26-28
you could use the 30Hz FMOD, it wont make a huge difference
and the directional thing: when frequencies get up above 85 or so they become directional (you can tell where they are coming from) and when you are trying to get a proper soundstage, you dont want any sound to seem like its coming from behind you