RiseFall123
100+ Head-Fier
One reason the HD660S is a good choice for many is that it sounds good/great on a wider range of gear compared to the HD650 so if you don't want to deal with amps then the HD660S is a no-brainer choice. If you are willing to go with a OTL tube amp like a BH Crack or other decent / good amp to me the HD650 is a touch better all around IMO.
Does somebody paired 660s with the mojo vs HD650 with a good amp?