Try following the instructions on Mojo's post about halfway down the page on the link below. I have used it with my 80s and EP500. As far as a SPL meter goes I think it should be a mandatory purchase with a home theater, I don't know what I would do without mine. Sub positioning just as sirquack mentioned is extremely important. I had my EP500 positioned in the front left corner of my room and wasn't happy with the results because it was causing a localized effect with LFE. I recently relocated it to the side wall about 2 ft. behind my listening position and I noticed a huge difference. You could also try the subwoofer crawl
Video or even the EP500 setup
Video LinkI'm not as knowledgeable as the other guys on this forum but hopefully that helps. Let us know how you make out.
Cam
