I use a QNAP TS-453B. You can’t connect the NAS to the DAC directly. That why it is N Network A Accessed S Storage. You would need a Bridge II with an Ethernet Port. You would run them on the same network. The NAS isn’t fanless I have two fans in it. The basic large fan for the drives and one on the accessory M.2 Drive Board. It is my NUC that is now fanless. Do not bother trying to run ROON on a NAS. The mediocre CPU’s can’t handle the load and ROON will disconnect regularly. I tried this for 6 months and gave up and finally built the ROON ROCK server.