In the audio gatherings I attended it’s been proven , start with your router
digital noise travels even house to house the garbage $5 wall wart added even more noise . Ibought a Linear Tube Audio LPS powersupply and it is a substantial upgrade, if you have a separate modem,router get rid of it Way outdated and added noise a combo unit only. I bought the newer Motorola 8702 which has docsis 3.1 bigger faster processor, all hard wired, but even wifi picture sharper ,I assume because of the great LPS cleaning up the power supply.,this unit has excellent build quality,being a ex audio dealer and
rebuild Loudspeaker Xovers I know Audio parts on all equipment very well.this unit comes with a excellent DC cable ,others charge $150 for for $50 off on Audiogon $700 it’s a true bargain ,don’t forget a Good Ethernet cable does count ,the most important at the streamer . Trust me ,if you stream and follow this you will hear a very nice improvement.