So a couple years ago I replaced a sub in my main theater room with a SVS PB-2000 and it blew my freaking mind. A couple weeks later, I added a second 2000. Again, mind blown. A few days ago I added a third and honestly, I can’t really tell a difference over two.\n\nNo worries as I’ll probably add it to my kid’s theater\/arcade room at this point, but is this normal? Am I just into diminishing returns at this point?