What I would like is a way to send an audio stream from an amp's audio output over ethernet (or wireless) to a 2nd Arduino which outputs the audio to a speaker. Essentially this would be an audio over TCP extender. Has this been done with Arduinos? If not, is it doable with a pair of Arduinos? Besides the Arduino and a network interface, what hardware is required? I have searched for a commercial solution and there are some but they seem to be quite costly.