Harmon Kardon computer speakers can be quickly connected to an HDTV with a Y-adapter to convert the TV output jacks into a single jack that will work with the speaker system. The Harmon Kardon speakers are self-powered, so the HDTV will not face any power demands by adding additional sound. Since the computer speakers also come with a subwoofer, low-frequency bass response should be improved over the built-in speakers in the TV set.
Insert the white and red plugs on the stereo cables into the left an right audio output jacks on the back of the HDTV.
Push the plugs on the other end into the two large jacks on the Y-adapter.
Connect the 3.5mm plug on the end of the Harmon Kardon subwoofer cable to the small jack on the Y-adapter.
Plug the cables from the left and right Harmon Kardon computer speakers into the matching jacks on the back of the subwoofer.
Plug the subwoofer power cord into a wall outlet.
Things You'll Need
Y-adapter with two 1/4-inch jacks and a 3.5mm mini-plug jack
Unplug the HDTV from electricity while hooking up the speakers.