I have a pair of 80FR's factory mounted in approx. 1 cubic sealed corner cabinets that were used as the satilites of a factory 3 piece system with a 15" woofer as the Low end driver. By themselves the have no low end and they realy need to be used as a 2-way system, but their mid-range is clear and sweet with a touch of warmth. I plan on adding coaxial mounted tweeters and try them with a sub-woofer. They were available from the factory as a 2-way with a coaxial mounted bullet horn tweeter. AS