Even if it has an input switch, those switches are generally not designed to be used as an alternative to a preamp and may not be the most suited to frequent switching back and forth. Even if feasible, it's very sub optimal as a long term solution to input selection.
can I connect 2 sources directly to power amp (one XLR one RCA)
I'm currently running a Lumin D2 direct to the XLR connection on my Anthem MCA 225 GEN 2
would I run into any issues if I simultaneously hook up my bluesound node to the rca inputs?
I'd like to A/B the sources and also use the HDMI on the bluesound for tv