I have an ipad 3 and a 4th gen iPod. Both are the last of their generation to use the old 30 pin connector. Whenever I plug either in with any cable, the iOS device beeps over and over again and the charge indicator alternates between showing the little lightening bolt and just the battery level. The iPod button on the media system remains grayed out. My infinity works just fine with both of them so I doubt they're too old to support. Also it appears that the USB port can't even charge these two devices. If I plug them into either of the back ports, they charge fine but those aren't connected to the media system. Any idea?