I have PSB Image speakers. My main front and left speakers I bought were the Image 6T's because they had the lowest bass response and best efficiency (91 an-echoic/93 room). I like my speakers. They sound good and they play loud enough of course. Although they are slim, or narrow looking, they are rather tall and deep, so still large and somewhat awkward speakers. Also, I usually use them with my subwoofer, so I wonder how much of their efficiency I am taking advantage of (crossed over at 100 hz!). Not to mention that bass extention, although many argue the speakers are probably blending well because they go down to 32 hz -3 dB. Just wonder if people have some examples of some of the most efficient speakers out there. I expect many will mention Klipsh, as I'm aware, they make some of the most efficieny speakers. I'm also looking for comments on sound quality. I'm curious if more efficient speakers exist out there that aren't too much more expensive and that aren't larger. I know someone is just waiting to reply with .."Why do you care about efficiency? Just get a speaker that has reasonable efficiency, ie isn't particularly in-efficient compared to the average speaker, and sounds good to you." Thats fine, but I'm posting here because I'm curious about what speakers are out there with the most efficiency so that is the kind of feedback and information I am looking for. As I've added below in reply, I'm adding in editing here. The reason for a search for efficient speakers is the same as my reasoning for looking for those newer digital power amplifiers and digital amp powered receivers. I am wondering how little electricity you can use to power a music/home theatre system. The goal would be to see if people living off-grid could manage with hi-fi equipment. Same goes for people trying to cut electricity bills. Audio-video equipment doesn't use the bulk of home electricity used in a home, but as other things become more efficient, it will be interesting to see how little audio-video equipment can use and still be high quality. So are Klipsh the most efficient out there?