Quote (vittujenkevat @ Nov 28 2015 03:36am)
You will be fine running them without an amp but amp can enchange the sound experience, O2 amp is pretty much best price vs quality amp to get for headphones. You can also use AVR if you happen to have one or plan to build HT.
no
an amp is to amplify which is to make louder and give more juice
hd598s does not have any odd mA or mW needs at any frequency
so tell me how it will do anything besides it being inside your head