The 700 Series A/V Direct Box converts the outputs of equipment such as MP3 players, laptops and DJ mixers to balanced, mic level signals that can be connected to audio consoles, mic preamps and house sound systems. A premium, fully shielded isolation transformer protects the purity of your sound from ground loops while providing a truly uncolored audio output. All Stereo inputs on the SC700CT are summed to mono and output to a single 3-Pin XLR connector.