Mert, the part of my comments that you didn't understand was that I cannot open the pictures you have posted, only the aquarium picture will open, and I was wondering if others are having the same problem.
Yes I use both. But I haven't tried kw500 with sophia 2 yet. It may work good with sophias and can give me another taste. (Technically, I can use kw500 as a perfect preamplifier together with Pass/Boulder unity gain mode or find a speaker with multi terminals like Kef Reference series and Bi-amplify with kw500-Pass/Boulder combination. It must be interesting experiment for speaker and local electricity network) Sorry I didn't understand your first question.
I heard those speakers and that amp the same day but at seperate shops, my dad almost bought the Sophia but went with Vandersteen wich were on demo with your amp. So you have salt water tank.....very impressive, I would love one but they say "never buy more fish then you can afford to loose in one day".......then I pet my dog and forget it!