Hi everybody. This is my very first post in AVForums, hope won't be the last. My problem is very simple (to explain) but very annoying. I own a cheap set of 5.1 speakers: 5.0 Eltax Universe and a Sub made by Magnat (Motion Sub 200A). As I have read everywhere, the sub should play the lowest frequencies, INAUDIBLE BUT FEELING FREQUENCIES. That's where my problem is: I really CAN hear the lowest frequencies, but not feel them, no matter how I setup my sub (only volume & cut-off). It's very annoying because I really end up feeling bad, sometimes with a terrible headache, after seeing a DVD. I don't have this problem in my brother's or my brother-in-law's house. I'd like to know (in case you could help me): 1) Is the sub the problem because it's soooo cheap? 2) Could it be broken? 3) Maybe my integrated decoder/amplifier/tuner is not feeding the sub with a good signal? I intend to borrow a sub from my family in order to do some tests. Until then (I dare it will be very hard to persuade anybody to lend me their subs), any help is welcome. Thank you very much.