A few months ago, we did a blog titled: Power Ratings and the Games People Play. This is an important topic, because many consumers choose their Audio/Video Receivers based upon the number of watts per channel published by the manufacturer. Unfortunately, as they say, "power corrupts" and a number of manufacturers are manipulating their power ratings.
Recently, Gene and Hugo of Audioholics put out an excellent video about power ratings that contains some great information. See it below.