Sound quality is not bad even with JRC5532.
This thing obliterates the cavalli hybrid tube amp every way possible.The cavalli will drive 600 ohms but you end up with it maxed out quite often.This amp isnt even working and drives them effortlessly which is a good way of describing the sound.The Cavalli was a big jump up for me.The E600 is a quantum leap.Soundstage,instument separation,detail(macro and micro),control.It quickly shows you the limitations of headphones.It also shows the sound you are actually getting from your source that you havent heard before.