yogibear1966 0 Posted March 4, 2013 Hi i have a avtech 677 8 channel dvr running at my home with 8 cams ... the question i want to ask is on the audio side is there a possible way i could add a out side speaker from the dvr and a mic in the house so it could warn off indruders before i let the dogs off .... Share this post Link to post Share on other sites
