Has anyone opened up this device to see exactly what it does? All filtering not created equal, not saying it doesn't work but I'd like to see the inside, photos at Stack audio only show what appears to be an unpopulated circuit board.
I use JCAT Net Card XE, will likely upgrade to this sooner than later, https://jcat.eu/product/net-card-xe-evo/ Everything exposed, OXCO clocks, plus filtering components one can see. I power my card from external device rather than streamer, in this case Uptone JS 2 fully choked LPS via DIY Mundorf Gold/silver wire. This is truly optimized network filtering and clocking at the front end, this feeds Sonore OpticalModule which then goes to OpticalRendu, usb out to Denafrips Gaia DDC, feeds dacs via Tubulus Ximius I2S. Realize this not a device many can use being my custom build streamer atx board based, but this gfves you an idea of what network optimization should be.
Everything powered by lps, all lps plugged into BPT power conditioner, all streaming components using lps can be plugged into same AC circuit as rest of audio system, its the switching power supplies that feed garbage back into AC line. Precision clocking throughout entire chain is critical, only wish the OpticalRendu had OXCO clocks vs the Femto. Also, I2S far superior to usb for feeding dac, even for those dacs with sophisticated usb filtering and clocking. Keep in mind I2S is native protocol in D to A conversion, also have the data and clock links via dedicated lines, dac doesn't have to separate data from clock. All I2S not created equal, clocking and filtering critical here as well.
I've used a number of network filtering devices in the past, they may or may not work to some degree, remember not all optimizations created equal.