@mijostyn I understand the principle behind dual opposing drivers. There are many ways to get good sound, with some better than others. That doesn't mean all other options are "wrong". I rarely listen at loud volumes and have 4 subs. They are never straining, which leads to distortion. They all have their volume at around 20 - 30 percent of maximum. They are well integrated, so that with most music, you wouldn't detect their presence. The same results can be achieved in a small room with a couple of smallish sealed subs if setup correctly, with great results and little or no distortion.