Hello, i want to improve audio quality go my macbook because i listen a lots of lossless music. I want to buy a DAC which can connect with my radial JBL speaker and my home system ( amplifier). Can you advice me the way of connect between my mac and DAC! i found that we have have two ways: toslink and usb! which will be give the best quality thanks! I have plan to use my DAC at home so wall power supply should be the best! thanks