I believe the Killer does roll off the highs and lows, so the XDS1 showed a room bass node that the Killer did not.
I believe it - it sounds like a NOS D/A converter. :-)
Seems to me there are two solid camps of audiophiles:
1. Would like to hear a nice and lush midrange and don't really care about highs and bass.
2. Would like to have bottom and top extension + extreme dynamics and resolution, while sacrificing richness in the mids.
Though in many cases, as one of my best friends put it, we are talking about "Addition By Subtraction", in my opinion, none of the above is something I'd tolerate. I want it all.
Unfortunately, this is very hard to accomplish, but not impossible. :-)
Best wishes,
Alex Peychev