Apparently, SOME people read WAY TOO MUCH into posts.

While speakers are the most important part of any system, home or mobile,
dependable and clean power is not all that far behind, nor is it as
insignificant as you suggest.

I don't have any problem complaining about ANY amp, regardless of who makes
it, if the unit doesn't produce enough clean power or is short of the sort
of dynamic headroom needed to properly drive any speaker in question.
Moreover, this particular Xtant of mine is not particularly well-suited for
the high current inputs (16V) fed from my balanced-lined HU, without
introducing a fair amount of noise and distortion into the system at
moderate to high volume levels.  So yes, an amp DOES matter.

Audison was recommended because it was cited as making units that can handle
high current inputs cleanly and making gobs of clean power when operating
with a 4 ohm load.  And they have a fairly nice, if a bit cold (to me),
sound to them.  As I discovered with some brands of speakers (like certain
inefficient models from Focal, for instance), not all amps, however good the
rep of the company that makes it and despite the glorious power ratings they
tag them with, make the cut.

BTW, I never 'dissed' anyone.  I merely pointed out that the X603 is
overmatched in my particular setup and it was time to look for other
options.