They're very much the epitome of the "New England" school of loudspeakers. Advent, KLH, Avid, other ARs, EPI and Genesis Physics, Boston Acoutics to some degree share the sound. I also think that many Polk Audio speakers live in similar sonic territory (even including my Polk-engineered Sony SS-m7s). A lot of people think that it was done the best with the AR-3a. I personally find them a little too laid back sounding but they really do have a captivating sound on certain types of music.