trade secrets from them that ultimately went into the creation of XD. In recent years, XD has also been licensed to the Pacific Theaters chain, and is currently being used at its Winnetka screen in Los Angeles as well as at the Grove in Hollywood, Los Angeles. In May 2018, Cinemark announced that over 200 XD auditoriums in the United States and Latin America would be equipped with THX sound. This allows audiences to enjoy uncompromised audio and video quality in an environment that fully complements the cinematic experience. THX works closely with exhibitor partners to meet THX Certified Cinema specifications, focusing on auditorium architecture, acoustics, audio and projection equipment calibration and speaker configuration. Recertification is conducted annually by a THX Certificated technician to ensure the cinema continues to meet THX certification requirements year after year. References External links Companies based in San Rafael, California Entertainment companies established in 1941 1941 establishments in California Economy of the Western United States Movie theatre chains in the United States 2006 mergers and acquisitions