You can use the unbalanced RCA to plug into the uDac. It has analog out on the back. I know exactly what monitors those are. The ASUS cards are as follows
External with balanced XLR: 120dB SNRXonar Essence OneXonar Essence One Plus Edition
Internal w/ RCA Unbalanced 124dB SNRXonar Essence STXonar Essence STX
124dB SNR is just crazy even 120dB is amazing but 124dB SNR is unbelievable.
The external cards have balanced XLR. Both cards have tunable OP Amps the One Plus Edition comes with a bunch of amp chips. You can really customize the sound to your liking that way.
Just FYI the externals are extremely expensive and you really do not need balanced XLR unless you are running extremely long cables. From my understanding balanced sends the signal down the cable 2x one of which are opposite polarity. Then any noise that is picked up in the cable is cancelled out at the end. Great for 50ft mic cables no big deal for 6ft interconnects.here's a good deal on oneEdited by givmedew - 11/8/12 at 1:41pm