You guys are Great! I asked one of my buds and said its quite logical really, PS2 has Optical Out so I would need Optical IN to make it work right. Since the Aiwa has only Op Out (for MP3 players and minidisc systems), basically two outs don\'t make any sound. :-) Surprising how many of us have Aiwa Minis, too bad we didn\'t think we needed the fizzin Op IN when we bought them.