As all of you should know, K1000 other then famous for performance, but also famous for eating power, now I am using my integrated amp (Densen B100 with DIY adapter) to drive K-1000, good result but not convenience as I mostly use loudspeakers, I would like to have a stand alone headphone amp, which circuit here should be powerful enough and the best for K1000?
All designs can drive your headphones very high.