Blatsi-
First, make sure that your settings are correct on your receiver for Bass Management and on the subwoofer itself...i.e., the crossover filter isn't engaging.

As far as placement goes, try the Subwoofer Crawl.

Something is wrong somewhere; the EP500 should be blowing you away unless you live in a small stadium! smile

::::::: No disrespect to Axiom, but my favorite woofer is my yellow lab :::::::