I was using the 9 volt output from my HDPlex for the FMC before my renderer, see following findings below. I had seen where replacing the caps in the FMC with better and higher value helped, but I am not aware of the SoTM mods for the FMCs. I would like to try out the UpTone LPS1, I have the Mean Well to charge it, but need to maximize what I am working with now first.
The Mean Well part number that I have is GST25A09-P1J, sourced from www.trcelectronics.com .
It does not come with a IEC power cord, if you get some, consider a IEC to male adapter and plug the Mean Well right into an AC outlet.
You also might want to consider 5 volt supplies or 5 volt battery supplies, see following findings below.
When I removed the extra isolation switch and the sound improved, it was obvious that the switch was injecting noise into the system.
What was surprising to me was that the switch noise was masking other noise in the system.
I have been trying different power/isolation schemes since my first post to see what works best for me and what does not.
Powering the FMC closest to the renderer with my HDPlex LPS 9 volts sounds better than with the Mean Well, but using a battery supply at 5 volts sounds better than the HDPlex. It has been suggested that powering the FMCs with 5V instead of 9V lowers the self noise they generate. Using a battery supply also provides complete isolation from any other equipment. ( though not the smoothest and most constant power )
The HDPlex works best powering only my NAS ( 12 volt ) and my PPA switch ( 5 volt ) sound wise. Too many loads connected to the HDPlex causes a loss in sound quality. Possibly due to the interaction of the connected loads.
I have removed the FMCs and isolators connecting the NAS to the PPA switch, in the current configuration there is no audible benefit.
The connection path from the PPA switch to the SSR renderer is now as follows;
PPA SW (HDPlex 5V) > 6" Cat6A STP > EMO EN-30 > 6" Cat6A STP > MC100CM FMC (Battery 5V) > twin fiber > MC100CM FMC (Battery 5V) > 6" Cat6A STP > EMO EN-30 > 6" Cat6A STP > Sonore SSR renderer
The EMOs along with providing isolation for the signal carrying conductors, also provide a break in any shielding that STP provides. This may be a benefit with regards to breaking ground loops that noise may travel on.
Suggested reading on the CA forum under Networks would be the Network Isolation and Optical Fiber threads. There are many things to try, LPS, SMPS, Battery PS, Supercap PS, isolation, grounding, shielding, the list just keeps on growing.
I need to pull my Theta Data Universal II transport out of mothballs and take it for a spin connected to my DirectStream. I am starting to wonder if shiny silver disks might sound just as good or better than all this complicated LAN stuff ( with all of its self noise )