I have heard the term "effeciency" used several times when refering to speakers. Most specifically on the website, the "about" section of the 7100 states "Smaller rooms, efficient speakers and problematic neighbors (or spouses) sometimes dictate the need for smaller amps. The Model 7100 is the ultimate elegant solution."

If I'm not mistaken the efficiency of a speaker is sometimes also refered to as the sensitivity and is measured in dB. But that's about all I know. I was hoping someone could help me to understand this a bit more. As some of you know (from my post on the 950 board) I am still in search of some nice in-walls/bookshelfs for the new HT in the house. What (if any) specific efficiency/sensitivity dB level(?) should I be looking for. I will be using the 950/7100 to power the speakers. Thanks in advance for the help.

Mike