you are absolutely correct, but the point that they are making is that making an ob woofer sit right or stand up in the position/ height to you need is so much easier to do than building a well executed box speaker that if you have, just the tiniest bit, of inclination to get your hands dirty and save a few bucks, this is very good place to do it since it is almost fool proof and you cant really ef it up. the savings if you look at it percentage wise is significant too. even though those drivers are more expensive than i though.