joe -- i see in another thread you are selling your lumin u1 mini. not sure of your upstream digital infrastructure but just thought i would mention the MSB pro ISL module + pro USB converter as an alternative to the network renderer module.
from reading info on the MSB website, a USB feed from a streamer/server/computer/etc is converted to an MSB pro ISL signal. what is unique to MSB is that the USB conversion process employs error detection and correction. all other USB based inputs i am aware of do not utilize error correction. the MSB pro ISL is a light signal and, thereby, completely eliminates all upstream electrical noise. hence, the DAC is delivered a bit-perfect data stream free of any electrical noise that can modulate the D > A conversion.
the MSB process here makes a USB signal functionally equivalent to fiber ethernet ... not sure why MSB does not offer a straight fiber ethernet input module (as does the lumin x1) but i suppose they have their reasons.
the network renderer and the pro ISL cost exactly the same amount. more info here and here
anyway, just though it was worth mentioning.
The reasons MSB’s Pro ISL Module is designed this way is for electromagnetic isolation and the ability to run an optical cable longer distances. The negative with the Pro USB Module compared to the Renderer V2 is that you cannot control the DAC’s analog volume adjustment through Roon via the IPad. You have to use the MSB remote.
Ken