I just bought a Panasonic TH-50PX50U and I was wondering if I could use the built-in speakers as center channel? I have a 5.1 receiver so I already have all the speakers I need. It looks a bit weird to have the built-in speakers sitting there doing nothing WITH my center speaker in front of it. Can I take my pre-out center speaker jack straight to the tv's RCA's (I think I would have to use a "Y" to do the mono/stereo connection). Any thoughts?