Ultrasone AG is a German company specializing in headphones for high end studio, DJ, and consumer uses.

Ultrasone AG was founded as German GmbH in December 1990 by Florian M. König with the stated objective to manufacture advanced headphones with an emphasis on the professional audio sector.

A feature of many Ultrasone headphones is a proprietary surround-sound simulacrum technology called S-Logic.

Since 1999, Ultrasone AG has been producing headphones that they claim reduce the risk of hearing damage, through the use of more efficient transducers and earcups shielded to reduce electromagnetic radiation, designated as LE/ULE (Low/Ultralow Emission).

Ultrasone claims that magnetic fields so close to the head could contribute to "listener fatigue" and might be "a potential health hazard".