I hope that somebody can give me an advise. I need to do same day editing for the Wedding, but the only place where I can put a screen is about 70' away from the DJ. I don't have my own speaker, so I always use DJ's equipment running RCA from the DVD player audio out, but I heard that if I pass 20' with RCA cables, it would start picking up RF interference. Is it true? Is there another alternative to moving closer to the DJ board? I.e. wireless? Thanks!!!!