The Rolls MX22s is a two-channel audio mixer, useful for mixing two consumer-level audio signals into a single output. For instance, you could combine the outputs of a laptop and those of a phono preamp into a single audio signal for further downstream destinations. For instance, if you don't have enough inputs on your home stereo receiver to accommodate your audio devices, you can mix two devices down into one stereo signal with this unit.
Channel 1 sports a 3.5mm stereo input, and channel 2 has a 2RCA input. You'll find level controls for both channels as well as two separate outputs. There's more than enough output gain on tap to feed power amplifiers directly. A power adapter is included.