It sounds clean and tight and I was surprised that it had noticeable output from 25Hz down with it being sealed. We didn't measure how much output, but there was definitely stuff going on down low. It just needs to be dialed in relative to the room (a bit of a null at the listening position) but otherwise, it seems like a very nice sub for the price. Due to your seating position and the shape of the room, you migh experiment with placement to see if it gives you any better output at the listening position and/or play with the phase a little to see if it makes any difference with it in the current position. Good work man!! I had a similar issue in my current room, and I ended up moving my couch to help deal with a bit of a null; that is part of why I sit so far back