dbx Inc. is an American manufacturer of professional audio recording equipment which was founded by David E. Blackmer in 1971. The initial goal of the company was: "To get closer to the realism of a live performance." Its early products were based on the concept of using decibel expansion which gave the company its name. dbx is best known for the dbx noise reduction system. The dbx noise reduction system used compression while recording an audio track and symmetric expansion when playing it back. Thanks to this you hear music of high quality.