I don't know that it would surprise me at all to find out that the Oppo does a little tweaking / EQ to the Pandora selection, knowing that it's dealing with compression and some likely perceptions from said compressions.

My Denon 3808 has a mode that's supposed to improve the sound of compressed sources. I don't remember if I have it engaged for those sources or if I had a preference or not. smile

::::::: No disrespect to Axiom, but my favorite woofer is my yellow lab :::::::