Yes i must be doing something wrong i just cant figure it out yet. I have the high level cross over set at 100 but ive tried all the crossover points with no difference. The amp is on, the light is green, the bookshelf speakers are working - and im running the bookshelfs from the subs so its not the high level connections on the subs. I took off the covers as was suggested to look at the woofers, and if the music is cranked and the song has lots of bass, then the woofers are moving slightly, but even with the subs volume as high as it can go, there isnt much bass beyond what the polks are putting out. My room is about 3000 cubic ft, maybe a bit more, so these things should be shaking the foundation. Frustrating as im so eager to see what they can do.