@audphile1 wrote:
Set up 5 and 6: The FMC in the chain reduced noise, improved imaging and soundstage but with the FMC I could hear thinner mid and lower bass (although clean and tuneful the bass was just slightly lacking), less slam. However, as I said, because of the improvements achieved here I think this a better configuration than the EERO direct into Lumin. The NA Eno between FMC and Lumin did not help with the thinned out midbass and bass.
This is correct. Kind of? The bass seemed thinner because it (fiber isolation) was stripping away distortion. And if you have big, powerful speakers (Legacy Focus SEs in my case) this is 100% welcomed. Actually any time you remove distortion - anywhere in the audio frequency band, it is never a bad thing, IMO. Going fiber all the way from router to FMC before streamer is even better. Much better actually. And of course a filter (band-aid) won't help restore lowered distortion unless it's adding it's own distortion to the signal!