@travisnordgren. No switch(although it might work) directly from router to Nucleus.
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As I understand it, a Roon Nuc is a stripped down single purpose PC based Roon Core device... I think its better than your iMac as far as noise (read EMI/RFI) is concerned... However it is still not as quiet as a ROON ENDPOINT might be...
The trick is to run Roon Core on your iMac (Nuc or other general purpose computer) and have an Roon Ready network streamer/player (aka Roon Endpoint) connected directly to your DAC... In my case something like this:
Apple MacBook (Roon Core) -> ethernet/Wifi/LAN/WAN -> Lumin U1 mini (RAAT/Endpoint) -> USB -> Chord Quest -> PreAmp -> Amp -> Speakers...
@travisnordgren - Have Roon Nucleus in my main rig feeding Chord Qutest via Curious USB Cable. Have Melco N1A functioning as a combination NAS and ethernet line purifier with Nucleus tethered via ethernet cable (AQ Cinnamon) to Melco's player port. Been running this configuration since November when I acquired the Nucleus and have been very happy with it. Earlier this month replaced Nucleus stock switch mode power supply with 19 volt Sbooster LPS, which also allowed me to use better power cord (Shunyata Venom 3). This provided immediate benefits, but Sbooster is still breaking in. As it so happens, the Nucleus replaced a Bluesound Node 2i in my main rig. The Node 2i is now part of my desktop system, and functions very happily as a Roon endpoint.
" . . . There is so much else going on in a PC. System monitoring and all sorts of stuff that you don’t realize. . ."
This is where Fidelizer and/or Audiophile Optimizer comes in. They shutdown or re-prioritize computer processes specifically for audio playback. The results are a lower noise floor and improved tonality. They can be used separately or together. If together, Fidelizer provides settings for a handshake. Still with anything digital, good LPS’s with good power cords are required to get rid of digitus completely. A PC requires a different kind of LPS than a router/modem. (It’s more than a voltage issue.)
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