Ultimate Ears

Ultimate Ears is an American manufacturer of custom in-ear monitors and speakers. Its custom IEMs are used by many touring musicians. Since 2008, Ultimate Ears is a subsidiary of Logitech.

Founded in 1995, Ultimate Ears made custom molded earpiece for musicians to block some of the stage noise and to allow them to focus on the desired sound. The prototype contained two tiny speaker drivers, one for low frequencies and the other for high frequencies, with the two split by a passive crossover. In 2003, Ultimate Ears had 80% of the professional IEM market.

The next year, Ultimate Ears introduced a consumer model, the UE-5c. The company was acquired by Logitech in 2008.

In 2013, Ultimate Ears launched the wireless speaker UE Boom.