HypebeastOn paper, it should be powerful enough, it outputs 5 times more current than Fiio E10k at 32 ohms, it also has an output impedance of 10 ohm which is fine for high impedance headphones.
Cburgess4049Objective 2 works really well and is the standard, its not very expensive too, a great all rounder amp that will work with both high and low impedance headphones with enough power to drive almost any of them.
HypebeastI think your 6'xxs needs a better amp an o2 or magni 2 or 3. I owned an older model of the sap 2 and it is very good entry level amp but I think you just entered the big leagues with the 6xxs. The fiio e09k and k5 are also better. You can get a used well built e09k for $70 on ebay