1. Electric: An AC Power distribution device generally used for trade shows and A/V purposes. Features a NEMA L21-20 inlet and outlet, and 3 duplex NEMA 5-15/20 outlets, color coded by phase. A product of Nutech Industries, but copied by many others. Shaped like a domicile for canines, hence the moniker. 2. Audio: A covered area over input/output ports on the back of a console. Usually this is part of the roadcase's construction. http://www.cases.tv/anatomy_of_a_doghouse.htm 3. A/V: An aluminum framed, black fabric surround used to mask Confidence Monitors from the audience.