from reading Janix's write-up, i think he only installed the AUX input; so that, he could get true stereo sound while playing DVD's. according to the article, the TV tuner outputs in Mono, not stereo; therefore, if i am reading Janix's write-up correctly, to get stereo output, u would need the AUX input. Janix (jmh) is a member here. hopefully, he'll pop in and shed some more light on this topic.