Man, this thing get down! Absolutely kills the sub that came with my Onkyo SKS-HT540. My expectations of this sub were about as low as possible so I was blown away when I fired it up and got it dialed in and heard the output this thing delivers. Not only does it easily fill my living room with hard hitting bass, it's wreaking havoc on pictures and other items that can be rattled out of place. My previous sub had a hard time filling my living room, this one fills the whole house!