When did you work for Traffic Jams?, I used to work there once about ten years ago and again about 3 years ago.

If you want to have 12V in your house you need to get a DC power supply.
That is what you would need to hook up a car amp in your house if you want to hook up your sub to a home receiver you just need to make sure your receiver can handle the ohm load because there are a lot of home receivers that can not be wired to lower than 8 ohms.