I recently purchased a Sony SA-WM40 that says 120w active powered subwoofer. I read so many reviews talking about how it really fills the room, and is often not turned up all the way because it is too loud and rattles windows. In fact, my parents have the same one and I can attest to that. But mine isn't bumping so hard.
At the moment I have no cable, no gaming system, no Blu-Ray player, only my HDTV. I have my laptop running into my tv through HDMI, and my tv running into my Yamaha-5730 receiver, and then of course my powered sub output from the receiver into the coax back of the sub. The volume is up all the way, restriction on the sub is turned all the way to the least restriction of frequency. Bass is up all the way on my receiver (+10db) and it does bump more as I increase gain, but nothing that rattles the windows or floor.
Is the poor bass reproduction because of my laptop? For example, if I were running a Blu-Ray player or cable, would the bass be much stronger? When I play a youtube test "song" where it goes through a series of frequencies, it does rattle the windows at some points, so I know the sub is capable. But when I play music with deep bass or movies with deep bass (think Jurassic Park t-rex), it's just some bass. Any ideas?