I am thrilled with my HD650's and CLAS -R/Rx Mk3 B+ /Silver Poison Toxic Cable (balanced) combo. I use the high gain setting and color the low end about 20% of the available bass extension. Expansive soundstage, impressive separation and nice dark space. Beautifully musical. Too bad I can't wear them on the trams and metros of Prague without disturbing the general public. That's why I decided to order the "big dogs" from Mr. Speaker. The Alpha Dogs with a Double Helix balanced terminator cable should really light up with the CLAS/Mk3 B powering them. Too bad there's a 6-8 week back order on them. Soon they will be mine, all mine (add sinister cackle here).
I'm going to try your settings next time I try the pairing, since my setup is quite similar to yours. Thanks for the tip.
I do think the Alpha Dogs will pair very well, maybe better. Those phones are also on my radar.