Most sounds from a sub a low enough that humans can't determine direction very well. And yes, I do know what it weighs, since I have the LFM1-EX which was its predecessor and weighs 1 pound more at 67 pounds. I placed mine on a piece of plywood directly on my theater seating to do the sub crawl. My 50+ years of experience tells me that the sub needs to be placed in the room in the right location OR you will get muddy bass due to the room nodes interfering with the response. If you can't put it on your listening chair then substitute something that will hold it while you do the crawl. 4 cement blocks and a couple of two by fours will do nicely to support the sub. There is no way that the sub is challenging the floor loading in your house. It weighs significantly less than you do, unless you are a 12 year old girl, so it isn't a problem. I weigh 5 times what that sub weighs and I don't have a floor loading issue in my stick frame home.