well to be honest i have no idea abou this stuff yet but am gonna be getting into it pretty good im sure. Well heres my first install that doesnt ****. I have four fifteen inch PG titanium elites running off of some big ol' octane R amps. the installer wants to make the box fire straight up. i hear that theres a phasing issue with that. whats the direction they need to face like angle wise to not experience phase outs. i dont want to wall it off, so i want to figure out what angles the speakers need to fire so it wont phase out the base. now heres the other thing its not for competition but rather to draw attention to the vehicle at shows (we are an extreme athlete team and its jsut to draw people over to our area) so SPL is not a concern as much as making it louder than hell out side the vehicle. So people get the "WTF is that" thing going on, and come over to our area. its going to made with MDF if thats important and in a sealed box for range purposes cause were not just listening to bass music and you only gain like three db from using a slot ported or some other ported box (right?). any thoughts on a good angle to avoid the phase out thing? Oh yeah its in an expedition too. i dont know if that matters or not so i'll put it in.