A:AnswerThe cable must be connected to the usb, and the headphones need to be connect to the usb not to the bluetooth. Follow the instructions located in the box
A:AnswerIf the superamp supports USB audio pass-through then yes, the USB dongle transmitter also has an audio optical input for the digital 7.1 surround sound.
A:AnswerIt comes with a cable to plug into the optical in the back of your ps4, but I think it depends on the ps4 you're using, slim vs pro etc. As far as the chat goes, I haven't had any issues, Sound has been great each time I've used them.