A:AnswerThe antena wire ~28ga conects to a single disconnectable pin on the main board. If you're good with a soldering iron (for the ground) maybe. Otherwise, no
A:AnswerI have not tried the unit with cordless headphones. It has an input jack for headphones that perhaps can be used in the same way a wireless mouse is used on a laptop. The unit also has listening to Bluetooth music capability, something I also have not utilized. The manual says one can enjoy audio from a Bluetooth enabled device which connects with wireless, through the speakers of the unit. Hope this helps.
A:AnswerNo, I don't believe it has that capability. There's no mention of the ability to connect a turntable in the manual and I don't see any connecting feature on the device. There is an input line in, but I think don't think it is intended to be connected to a turntable.