I have an AC3-RF input om my Harmon Kardon ADP303, what can I hook up in this in Last response: January 11, 2011 10:39 PM in Home Theatre Legacy Share fastball October 30, 2010 6:51:29 PM Hi to all of you, What type of unit can I hook up to AC-RF input ? Please give me some idea ....thank you ! AH More about : ac3 input harmon kardon adp303 hook soundguruman January 11, 2011 10:39:28 PM It's only to hook to an HK remote control kit. Nothing else will work. Can't find your answer ? Ask ! Publish Read discussions in other Home Theatre Legacy categories 4DTV Satellite Laser Disc Players MPEG DVB Replaytv Tivo !