Connecting a second AirPort Express to existing network
I already have an Airport Express wired to my router, but I am trying to add a new AirPort Express to my network. The original AirPort Express is on the main floor of my house and the new one will be in the basement.
Does the new AirPort Express have to be connected via cables to work or can it be connected wirelessly? The main use of the new one is to turn my analog stereo into an AirPlay channel.