If I were to get the 5.1 take classic energy speakers, and get RCA to 3.5mm, plug it in to my Air/iPhone, would they both play through 5.1? or would they only go through 2.1? Also, is there a music format that enables one to force mp3 files to play through 5.1 (w or w/o surround sound)? I guess the question is not clear cut, but I just want to know what are some issues on hooking up a 5.1 surround sound into an iphone/MBA. Thanks!