I bought this DDC from APOS shortly after I got the D90. I previously had gear connected to a computer, which in the past had caused ground noise issues, but the U90 always ensured the digital signal was clean. I no longer need it because the DAC I am upgrading to has its own built-in digital isolation.

Not interested in any trades at this time. All asking prices include Paypal and shipping+insurance fees anywhere in the CONUS. If you are interested in doing a local exchange (I'm located in Delaware), please contact me to discuss.