A:AnswerI've seen several iPhone users indicate connectivity issues with this unit. My understanding is that you can use a wired connection for your charging needs.
A:AnswerYes it does have a plug on back of the head unit for a sub. Its a single plug labeled subwoofer. U have to get a Y adapter so your 2 RCA cables coming from amp. Plugs into adapter. Then adapter taking it to single plug then to head unit.