Although this is an old post, it's such a common question. First, a sub is not a cure for every bass problem if the size and output aren't used in the correct location. Secondly and most important, the setting for subwoofer should correspond to the low end of your speaker to cross over cleanly. It you follow the typical reply they say 80-120hz which is totally wrong. A subwoofer produces subsonic output and 80 Hz is absolutely the highest it will work properly. I own this one and so does my son and both work very well. If you're using it in the kitchen, try using a throw rug to sit it on and move it close to the corner. When you have music on, set the volume to where you just feel the effects of the sub and no higher. Turning the volume too high will distort the sound (muddy). There is probably no good place in a basement for an 8" sub, and turning it up will only make it sound awful. In this location, maybe a 12" sub with 200+ rms is probably the minimum. So maybe you have the wrong sub for your situation.