Sorry for starting so many new threads but no one replied to my questions about a ported box for a 15" SX. (maybe because it was in the sub. section) Anyway.....i decided i am gonna go with a SX and give re a shot. But i have never built a ported box and need some help! i dont have much room to work with but here are the dimensions i have....(18" w x 20" h x 16" d) i dont even know if thats enough room to build a ported box...but then again i dont know much about the SX. I can always make the box a little bigger...it will just have to be very odd shaped. I guess all im really trying to figure out is the internal volume for the Sx, size of the port, and what the port should be tuned too...from there im sure i can make it fit.