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.
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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.