Stax Ltd., a Japanese company founded in 1938, is renowned for its high-end audio equipment, particularly its electrostatic headphones, which are marketed as "earspeakers" due to their superior sound quality and design. Stax pioneered the development of electrostatic headphones, introducing the world's first model, the SR-1, in 1960. This innovation set the standard for high-fidelity audio reproduction, and the company has continued to refine and expand its product line over the decades.