A lot of people like their bass to be loud just to show off, and when they do this they do not care about quality.
Personally, I use high-quality components with high-quality subwoofers and amplifiers. It costs dramatically more, but in the end it is worth it. Especially since I listen to techno, trance, electronica, etc. I also listen to rock, hard rock, metal, punk, fake emo, and hardcore rap like lil' Jon.
I also do not use my system to "show off," but for my own listening enjoyment. Impressing others is not my forté.