The Kramer VS-4X is a high quality mechanical 4x1 switcher for balanced stereo audio signals. It is designed for applications requiring an unpowered desktop unit for routing balanced and stereo audio signals. High quality switching components provide excellent isolation between inputs. The machine can be 19-inch rack mounted using a special, optional rack adapter. This unit uses professional XLR type connectors and is therefore suitable for use in the most demanding audio applications.