Tired of the old ball and chain complaining that the TV's too loud? Short of reminding her who pays the bills, you could opt for the TV Hear, a wireless speaker that hooks up to your TV that you control independently of the TV's speaker. Or, in English, you can have the TV's speakers down to near inaudible levels while your TV Hear is as loud as you want it to be. Not a bad idea, especially if you and the Mrs. are on separate beds. (Of course, a pair of wireless headphones would do the trick as well, but that's not nearly as fun.)
The TV Hear works within a 10-meter (33-foot) radius of a TV and is available now for $75. It's a fun idea to be sure, but I question paying $75 for a mere speaker. I doubt it even goes to 11.