I have just added a Topping D70S to my system. Currently, my two-channel setup is PC-D70S via USB - RCA out to analogue input of Marantz SR6013 - RCA Preouts on AVR to Atoll AM100 and AVR subwoofer out to 2 Paradign Seismic 110's. I do this as the front speakers and Subwoofers are used in my...