Roon Core on Mac mini 2014 I5 on 250 SSD, Music on QNAP NAS , endpoint ZEN mini MK2 with DAC REGA via USB on my REGA brio, additional connection via Pro- Ject DAC with my NAIM Muso-1 via Zen mini for additional bass enhancement with my small Monitor Audio boxes 7 Gold .Bluesound node to get touch with my 2nd Audio upstairs.