The MuxLab Stereo Hi-Fi 2-Pack RCA Balun Kit
is a set of two baluns that work together to enable an analog audio source with hi-fi sound quality. One balun connects to the analog source and the other to a hi-fi amp system, and over an optional Cat5e/6 cable, the first balun carries an unbalanced signal to the amp system, which amplifies the signal with hi-fi sound. The Cat5e/6 cable can be as long as 3,250 feet. The baluns each connect to their source by an integrated 6" RCA cable with a male connector.
The simplest example of an analog audio source is a cassette tape player.