I found an old stereo receiver in a garage sale $15. Kind of big and generates a fair amount of heat but it works. I have outdoor speakers mounted under my eaves and run two speaker wires out of the house. My show computer, FM transmitter, antenna, stereo receiver and dongle are in the house. I run 3 wires - 1 cat 5 and 2 spkr wires thru the top of a window opening and stuff an old towel in the opening to keep the wind and cold out.