I wonder because I guess I can make at least two very good sonosubs for the cost of only one SVS for example. True, not everybody will have the patience or the interest to build its own subwoofer, this is why SVS or HSU will survive, even when one can make a similar product. But what I really wonder is if there are important difference in sound quality/quantity when one goes the DIY path. Im thinking in a couple Shivas or Tempest and to drive each one with the 250w amplfier from Adire. I know the drivers, at least on the SVS ultras are better than the ones I want to implement, but will I lose anything important? Im interested in 50% music and 50% HT, so quality bass is important also... Thanks!