I'm trying to setup my 2 front channel speakers, but I am using unshielded speakers and I'm not sure how far I should put them from the TV to avoid any problems. I have them about 1-1.5 ft. from the TV right now, and I don't notice any discolouration or anything; do you think this is sufficient? Or should I have them further away? The speakers are 50 W. bookshelf speakers (about 1.5 ft. high). I haven't noticed any strangeness in the picture with the TV, so is this distance far enough? Or does having the speakers too close to the TV cause any other invisible problems that I'm not aware of? I'm kind of worried that I may have wrecked my TV without knowing it, but I hope that all is OK.