When streamer is not a PC, there is less noise circulated. There was a discussion on a local forum and not all agree with me, but I am against shielded cables. Twisted pair (Cat5e) is optimal in home installation. Twisted pair blocks high frequencycommon noise (but not 50Hz and harmonics), it is very important. There is more noise on the transmission wires, but as long a noise is not generating transmission errors (calling for packet retransmission - delays), it is fine. Up to 100 meters there is no uncorrected errors, it is a requirement. Your connection is only 1m long...
A shield protects data wires, but brings common mode noise, frequently from distant places. Now you need to deal with a proper shield termination, but not all equipment has shielded connectors. Even if it does, there is a dilemma: terminate shield or leave it open... one side (which one work better) or both sides??? People who argued with me spent lot of time trying to establish an optimum configuration. There is no general guideline. When it accelerate a problem, you start looking for the audiophile grade switches.
My suggestion is to use a dedicated switch in the location close to the main switch device (the only streamer plugged in to this switch). A similar solution to USB self-powered hub. It will block most of noise from all other devives connected to the main Ethernet switch. Alternative no cable connection to the main network, but a small
WiFi extender plugged to a wall socket. Disable internal WiFi adapter on the streamer (if present). A short Ethernet cable plugged to your streamer. Configure extender in network adapter mode and you are protected.