Best Dark Sounding Amp For Bright Speakers?

This is what I did. Cal Labs CLD-10 > EVS Millennium DAC II > Odyssey Tempest Preamp > Odyssey Stratos Monoblocks > Infinity Kappa 9's. I/C's and speaker wire are Groneburg Quatro Ref. Digital cable is Bolder Cable w/Eichmann bullet plug. This setup does not sound bright at all. It sounds very natural and dynamic. My Kappa 9's have never sounded better.

Electrocompaniet?

Aragon 8008 BB

I would try McIntosh. There were other good suggestions here too but felt Mc had to be added. I got rid of the Krell KSA100 for the same reason and ended up with McIntosh as my favorite.

The new SA102 from Plinius is worth a try. An excellent amp, but Peter Thompson voices them with Shahinian speakers - and so they tend to work best with metal dome tweeters and need quite 'open' sounding cables. But if you get the balance right the naturalness of the sound, dynamics and inner detail are simply superb. The SA102 is more like half a SA250 MkIV than the SA100 MKIII it replaces. Dryer than tubes, but otherwise very similarly lush and full with a dose of added magic.