Headquartered in Southern California, DEI Holdings, Inc. is the parent company of some of the most respected brands in the co ... nsumer electronics industry. DEI Holdings is the largest designer and marketer in North America of premium home theater loudspeakers (sold under the Polk Audio® and Definitive Technology® brand names), and consumer-branded vehicle security, remote start and mobile audio systems (sold under the Viper®, Clifford®, Python®, Autostart® and Orion® brands of its Directed Electronics business unit). Founded in 1982, the company has operations in California, Maryland, Canada, Europe and Asia. read more