A quick update to this post... I ordered the NXG and for the money it's really a pretty impressive sub. I hooked it up last night and tested it out on some music, and moved it around the room to find various locations. It seems pointed into the corner with 180Deg out of phase is about the best so far, with a lower crossover than usual at around 70 (there is just a dial with tick marks). It produces much more bass than I expected, I had to turn the gain down quite a bit to match the other speakers. It has hit every low note I've thrown at it so far with ease. Requiem Dies Irae is one of my go to songs for testing (I have a really high quality recording of it). It has a nice range of dynamics, with some pretty low frequencies when the bass drum and timpanies come in. I need to test it on a good movie, but so far I'm pretty impressed considering how much I spent.