I have an SVS 20-39 PC+. At my old house, it was located in a corner in my living room. The living room was on the main floor with a basement underneath (i.e. firing against a subfloor). The sound was unbelievable. The room was about 13X20 and it was awesome. It would shake the seat when hitting certain lows. Fast forward to my new house. I have an area in the basement for the new home theater. It is about 13X25, with an area on the right that opens up to the staircase and an area in the rear that opens to the rest of the basement. I have the sub located in a corner in the front. It is sitting directly on the carpet/pad which is on top of the cement pad. I am completely underwhelmed by the sound now. It doesn't have the punch it used to have and won't go nearly as low as it used to. If I turn it up, it only begins to rumble without adding any real punch. I imagine this is due to having a cement floor now. What can I do to increase the capability of the sub in this environment? Man, I miss the feeling in the old room.