Grimly Curmudgeon wrote:
To plug into my new workshop music system I need
to devise or find complete a wifi reciever that will
put out a line-out signal for the pre-amp.
Initially, I can plug my smartphone in, but I'm thinking
of something more permanent - and cheap, it's got to
be cheap.

Does it need to be WiFi? There are cheap bluetooth A2DP receivers and
transmitters ...