The Emotiva SP-1 is designed to work with our Stealth DC-1 DAC or your current DAC or analogue preamp to expand its flexibility and input capabilities dramatically. When you connect the SP-1 to an available line-level stereo analogue input on your preamp or DAC the SP-1 upgrades that single input to three line level inputs passively switched by precision control relays and a phono input powered by the SP-1s own internal high performance low noise precision phono preamp (which supports both moving magnet and moving coil cartridges).