I was going to put my sub (EP175 at the time), front and center under the TV. Seems logical. But after doing the sub crawl, the best location ended up being near either the left or right side wall, about 4 feet back. Since then, I've placed an EP350 and an EP500 in the same spot with excellent results.

https://docs.google.com/spreadsheet/ccc?...amp;usp=sharing