Well I trust you ear but I guess I am gonna keep it "simple" for a while. Until I figure the next best move... I would like to add a dc jack and a switch between external and usb power, and buy a fancy psu perhaps. And I will add for sure an i2s out.
You sure were right about this interface, though. Thanks.
I made some other tweeks with my PC Ethernet to the REDNET that have yielded some nice SQ benefits.
This Antelope Ovenized OXCO Isochrone OCX clock will be here on Wed to reclock the RN3 - it also allows an 10Mhz Rubidium Atomic clock input - as does the Mutec MC-3+ USB.
So I'm looking for one of these used:
Stanford Research uses a special cross cut crystal to achieve the most remarkable phase noise numbers - especially for an atomic clock: