Hi, I would like to use my AudioBox USB for recording stereo output of my HiFi equipment. My amplifier has a 'Rec out' and a 'Pre out' connection (both Cinch). How can I do that? Connect the 'Rec out L' to one of the 'Mic - Instrument' inputs of the Audio Box and the 'Rec out R' to the other one? What cable type would I need? Thanks!