SOLD.
I've had this for about 2 years. This is my 2nd DCX, the previous one had the infamous crackling / noise problem. This one has been clean the whole time I've used it. Unmodified except for some small rubber feet I put on the bottom so it wouldn't scratch the component it was sitting on. Date code 0805, firmware version 1.16.
I also have a Canare 75ohm-110ohm digital audio impedance matching transformer. See here for details: Canare BCJ-XP-TRB 75 Ohm to 110 Ohm Digital Audio BCJ-XP-TRB B&H
I have an RCA-BNC adaptor, which combined with this transformer, gives you what you need to go from the SPDI/F output of a regular DAC to the AES/EBU input of the DCX.
$175 shipped in the lower 48 states, and I'll include the Paypal fees in that price.