Cambridge Audio streamers use their own proprietary interface called Stream Magic that is very easy to use. Links up to smartphones and tablets and comes preloaded with Qobuz, Tidal, and the others. They look great, have excellent sound, and most will accept external drives and also link up to any other digital sources already on your system. I use the CXNV2 and have been very satisfied with it. It was recently updated with their newer CXN100 that runs $1099 msrp.
