The Bose 901 is a line of loudspeakers produced by Bose Corporation. They were first introduced in 1968 and are known for their unique design and use of multiple speakers. The 901 series speakers utilize a total of nine full-range drivers to achieve a room-filling sound. They are also known for their ability to create a spacious and lifelike soundstage. The speakers are designed to be used with a compatible active equalizer, which is used to optimize their performance. The Bose 901 speakers have gained a dedicated following among audiophiles and music enthusiasts.