I can understand all you guys are saying about the cheaper subs...... but you must remember that alot of the music you listened may have been mastered using one or two of them. Subs are becoming more mainstream in studios, be it amateur or pro, so the idea is to set it up properly. I cannot understand that if you have your mains running full range and then you carefully dial in a sub to do the rest, I cant see how you end up with worse sound.
I think the problem is alot of people dont know how to set up a sub properly and that is where the problem lies (I dont count myself in the category that can by the way). Placement is just as true and important for a sub as it is for any speaker, and if you get the placement and the crossovering and the level matching right, I believe that you may just change your mind as to the bad a sub can do. Problem is most people want to beable to feel the sub and hear it pound like there is no tommorrow, and that is where the problem lies. A good sub setup properly can only augment what is already good with the rest of your setup. A one note bass sub, put in a corner to amplify that one note, and cranked to volume eleven and a crossover point set to high or to low will screw everything up.
The sub, once decent enough, is not the problem. How you augment it is.
Oh and the floorstanders that can reach in the low twenties are already screwed up in terms of balance if they are cheap, or cost an arm, a leg. How many good ones cost under $3000? Where as I can buy some nice monitors, Dynaudio Audience 52 se for example, and augment that with an REL sub or Velodyne sub or even a Dynaudio sub or even two subs working in stereo, and get the low twenties, and spend only 3000 bucks, I may have to go to something like the confidence line and spend $5000 or more to get the same bass depth. In the end you may have to spend even more time trying to place the full range speakers just to get the bass right and still have to compromise betwen soundstage, sound balance and bass weight, or spend a good deal on proer acoustic treatment on your room.
D