Wired vs. Wireless

hickamore, It's the wire, conducting electrical noise from computer or router/network to the DAC.  Even optical isolation in Ethernet network has few picofarads across - enough to inject some high frequency noise.  I would limit number of necessary wires (power wires for USB are not necessary if DAC is self powered) and use shielded cables to reduce pickup of ambient electrical noise.  I would also avoid placing network wires next to power wires. 

I'm not saying one method of delivery is better than another.  I use wireless, because I couldn't route Ethernet cable across the room.  I had a lot dropouts, until I switched to 5GHz band.

kijanki, appreciate your explanations and advice. I suppose few if any audiophiles enjoy a theoretically ideal setup. Just trying to make the best of my own circumstances, thanks for sharing.

Wire all the way. Bluetooth is part of the noise most of up are trying to avoid. Why would you want that to be the way your music is transmitted to your wonderfully new headphones? HiFiMAN is pitching Ananda BT. But they are in business to make money. Get the regular Anandas.

Earphones, earbuds, and headphones have become an essential item for many people today. But while they can do a great job allowing you to listen to music whenever and wherever you want, they also come with a few drawbacks. They can break relatively easily, the sound can glitch, the wires can get tangled, and if you get a wireless pair, they are extremely easy to lose.
A pair of wired earphones is a great choice for anyone who wants to have their headphones connected to their device at all times. These models are easy to use, they don’t have any battery to charge, and they are extremely useful for everyday situations.
Wireless headphones, on the other hand, are a little more complicated, but they can definitely be worth the effort. These devices are great because they let you listen to music wherever you go without having to worry about wires getting tangled or breaking in the middle of your favourite song.
https://www.techshout.com/gadgets/2021/30/wireless-vs-wired-earphones-make-the-right-choice/