The worst were Acousti Phase sold by Crazy Eddies in NYC back in the 70's. They would disconnect the tweeters on JBL L100's or put speaker upside down and then play Acousti Phase with an equalizer hidden away to improve the sound. They sold many of these speakers with Kenwood receivers which they would sell for close to dealers cost. (They made big bucks on the Acousti Phase speakers though) Second place goes to Ultralinear! Also mid seventies.
