I bought 3 units of these converters just to see how they work with my setup. I have 3 Universal Apollo QUAD interfaces and I wanted to feed the SPDIF inputs of the interfaces with very low budget analog to digital converters. I'm running my DAW at 48kHz and these converters deliver the audio from the synthesizers without hickups! I am more than delighted about these converters and I can recommend these to anyone looking for low budget conversion from analog to digital domain. Inputs are RCA connectors, PSU is solid and I bought regular RCA cable to connect between the converter and the Apollo. You have option to send out ADAT SPDIF signal, but I'm using the RCA connection. If I am going to expand my digital interfaces further more with SPDIF inputs, these are the units I will hook up to add more analog sources!