The one thing that I have done to improve my 4 yr old (out of warranty )Aqvox switches and TP-Link FMC,s was open them up and install thin rubber on both top & bottom of the frames. This is what Aqvox does on there SE version to increase a blacker background and I also drilled holes in the bottom of the frames to attach 3 Alto_Extreame Lyd1 footers. The improvement I'm hearing I believe is a reduction in jitter.
I have the switch, fmc and W4S LPS sitting on a Symposium Segue shelf feeding my server & dac.
Another improvement I read about is that the switch should be feeding both the server and dac, with port 8 feeding the dac, fmc into port 1, port 4 feeding server, port 2 source ground into grounding box. This gave me better sound then the dac being feed from the server direct and I believe because the Aqvox switch re-clocks the signal but that's just a guess.
I have the switch, fmc and W4S LPS sitting on a Symposium Segue shelf feeding my server & dac.
Another improvement I read about is that the switch should be feeding both the server and dac, with port 8 feeding the dac, fmc into port 1, port 4 feeding server, port 2 source ground into grounding box. This gave me better sound then the dac being feed from the server direct and I believe because the Aqvox switch re-clocks the signal but that's just a guess.