It's pretty good tbh........
I don't use the Radiance for 2 channel music, as the bass is adequate on the Q500's now they are set up/run in.....
Saying all that, I am looking into possibly adding a Rotel RB1510 2 channel power amp at some stage, to again bi amp the Q500's........as some of my music can sound a little muddled, and I'm assuming o power amp will offer a bit more control in the bass/mid area if bi amping the treble unit via the denon receiver....