DESC: The Cinema Ultra II LCR carries THX Ultra 2 Certification to provide superior 7.1-channel Surround EX home theater performance (not to mention best in class 5.1-channel performance). The Cinema Ultra II LCR (sold 1 each) is perfect for the front Left, Center and Right channels in a home theater system. The LCR features a rotatable midrange tweeter array for directional sound field optimization. Sonance engineers have taken great steps to insure superior performance regardless of wall cavity variances by including an integrated backbox and integrated mounting system.