Network Acoustics Eno Streaming System vs SGC Optical Isolation System

Appreciate the discussion. For a while I've felt like the amount of tweaks that could be done to enhance streaming and reduce noise can be overwhelming to grasp - FMCs, ethernet cables, LPS, servers, modems, switches, passive devices (Eno), routers, hard wired from a mesh system vs WiFi, etc.

For the past two months I've tried to educate myself and played around with some cheap switches, RF/EMI shielding tape around cheap switches, new modem, placement of hard wired mesh system/point, and cheapish ethernet cables to see if I could hear a difference before taking a deeper dive. 

For my wallet I was hoping NOT to hear a difference, but I do. This practice unfortunately reaffirmed my belief that everything matters in this hobby. 

@jjss49 appreciate your experience. @oddiofyl and @jerryg123 and @ddafoe appreciate the links - I have them in my wish list.

I like the passive nature of the Eno which also equates to less cables - I would imagine the passive nature bypasses any noise that it may otherwise induce if it were being powered, which is what we're trying to reduce with an LPS for the last FMC, right? 

Thanks @audphile1 for that confirmation. 
 

I went with the SGC Optical Isolation System and heard a pretty big improvement - so much so I’m contemplating the Optical Module Deluxe. 
 

Here’s a question I’ve been wondering, though. Current setup looks like this:

Mesh router > generic switch > ethernet > FMC > optical > FMC > ethernet > NAD C658 (Roon end point). 
Mesh router > generic switch > Ethernet (15’) > Roon Nucleus.

Nucleus and NAD C658 connected to the same network via switch. NAD does not take USB input from Roon Nucleus.

Question: would FMC between router mesh point and Roon Nucleus have any impact on SQ since NAD and Nucleus are only connected through network switch?

Appreciate the responses. I haven’t identified any hardening of the sound so far, but I’ve also been listening at lower volumes early in the morning. I will say, though, the clutter is more than expected with the FMCs and LPS. I’ve had to spend quite a bit of time with placement and organization. 

JS are you saying:

Ethernet > FMC > optical (10 meters) > FMC > Ethernet > Switch (?) > streamer

Here’s what I have:

Switch > Ethernet > FMC > optical > FMC > Ethernet (0.5”) > streamer (Roon end point)

One of the ports from the switch is then:

Switch [same switch as above] > Ethernet > Roon Nucleus server

Switch is needed in my case for server and streamer, but I’ve also heard on other threads that audiophile switches clean up the signal even more before the FMCs. I’m having the FMCs [essentially last FMC with LPS] clean up the signal after my generic switch and right before my streamer. I haven’t heard of adding a switch after FMC utilization, but perhaps people are? I’ll let more experienced people chime in if such is the case.