Anyone who owns a TV or surround sound system should have this:

http://www.amazon.com/gp/product/630...v=glance&n=130

Televisions in particular are set up to look good under the very bright florescent lights of a sales floor, NOT your living room.

Surround sound systems, well, they just need a little calibration now and then. After all, you don't live in a sound stage (and if you do, I'm jealous).