Yes Greg, I assumed you were saying it takes expensive subs to follow the methods I use, that is not the case. I've saved up through the years. Started with a EP350v1, then EP500, then EP600, then added 2 EP350v3's.
Keep in mind, my room is around 8,000 cubic feet. Cheap, wussey subs just can't cut it to preasurize that space.