Chord Electronics Chordette Prime is a Preamplifier with 4 inputs and bi-directional USB. The Prime preamplifier has been designed as the control centre for your Chordette or existing HiFi system. Up to four sources can be connected via the analogue inputs and the USB connection allows direct digital connection to a personal computer. The USB input will not only playback music but will also allow you to record the audio from any of the analogue inputs directly onto the computer. During playback via USB an optical TOSlink output acts as a digital record monitor or as a digital feed into another DAC or AV system.