Bass! If anyone is confused why it's so popular, maybe it's something in a persons genetic makeup that makes them think that more bass is better. I'm under the impression that they have studied the effects of bass and the results were bad. But like smoking, people do it anyway. When I went to school in the 80's-90's, everyone cool had woofers and amps in their car. They probably only had stock stereo speakers or cheap 6x9's for highs, which wasn't as important. It's really cool when you're rolling up to wherever and the earth shakes, so they also made things other than woofers that produced earth-shaking noise called bass shaker that took up less space than speakers They were doing insane stuff with woofers back then, even had some incidences in bass competitions where people had their heart stop while sitting in their car with bass blasting. I used to go to the car audio shop and check the prices, and they were pretty high for all ranges of speakers and amps. I got some Polk Audio tweeters with Rockford Fosgate 5.25 speakers and an EQ that pushed 50 watts of crap. It cost me over $600-, but I was out of the stock stereo game and it was good. I had a truck then, so I didn't think a woofer purchase was worth pushing me into the steering wheel to fit them behind my seat. Yeah, my 5.25's or 5 and a 1/4's, bumped a little, but the tweeters were as cool to me. A real competition audio car back then had all the different size speakers including tons of tweeters and mids, so you could hear all the frequencies; and, with most woofers you could feel the frequencies you couldn't hear. But bass was huge in those days, way bigger than it ever needed to be in a car unless you were going to have a block party. I even remember going to Raves in the mid 90's and we saw people who were dancing right up in the speakers, people we called speaker freakers (because it looked like they were freak dancing with the speaker) or speaker tweakers. They have a section at most record stores with bass music too, which I find amusingly funny to play in rush hour traffic on the highway. OK, I had woofers in a couple of my cars along the years. I also had about 6 bass specific type tapes and cds, even though they do play through most of the frequencies: names like Bass Mechanic are about all that come to mind atm. Anyways, I don't really feel like headphones are made for heavy bass and that's why I don't use them for it. To me it just overwhelms small speakers. Maybe orthos can handle it better, but most people with them would never care to try.