XLR adapters will work and in most cases should work quite well, but you might want to experiment with Jensen transformers for a true balanced to single ended conversion. Their downside is that you will need two pairs of interconnects to go between the components. The upside is potentially better sound.
XLR to RCA Adapter Dilemma
I know that use of adapters should degrade the sound. However, when I use the XLR output of my BAT preamp into the single ended input of my power amp, the sound is much fuller than when going from RCA to RCA. Could this be because the XLR output has a higher gain than the RCA? Your thoughts would be appreciated. Thanks.